\ProvidesFile{pgf-go-sgf.sty}[2026/10/30 v0.2026.10.30 pgf-go: SGF games]
\ExplSyntaxOn

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%-----------------------------------------COMUN-------------------------------------------------%
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\cs_generate_variant:Nn \msg_warning:nnn {nnV}
\cs_generate_variant:Nn \msg_warning:nnnnn {nnnee}
\cs_generate_variant:Nn \prop_if_in_p:Nn {NV}
\cs_generate_variant:Nn \prop_item:Nn {NV}
\cs_generate_variant:Nn \prop_put:Nnn {Nne}
\cs_generate_variant:Nn \prop_gput:Nnn {Nne}
\cs_generate_variant:Nn \str_case:nn {Vn}

%LOS COMANDOS DE SGF NECESITAN UN KERNEL QUE LEA PARTIDAS (kernel = lua).
\cs_new_protected:Npn \__pgfgo_sgf_if_kernel:n #1 {
	\pgfgo_kernel_if_feature:nTF {sgf} {#1} {\pgfgo_kernel_require:n {sgf}}
}

%EL TAMANO Y LOS PUNTOS blank DE LA ULTIMA PARTIDA LEIDA EN #1, COMO OPCIONES DE goban
%(size = 19x19, blank = {...}).
\tl_new:N \l__pgfgo_sgf_blank_tl
\cs_new_protected:Npn \__pgfgo_sgf_board:N #1 {
	\pgfgo_goban_sgf_blank:N \l__pgfgo_sgf_blank_tl
	\tl_set:Ne #1 {
		size = \int_use:N \l_pgfgo_kernel_sgf_size_x_int x \int_use:N \l_pgfgo_kernel_sgf_size_y_int
		\tl_if_empty:NF \l__pgfgo_sgf_blank_tl {, blank = {\exp_not:V \l__pgfgo_sgf_blank_tl}}
	}
}

%LA CLAVE partial DE \sgfdiagrams, \sgfproblem Y \sgfanimation: auto (#1 VERDADERO), false O LAS ESQUINAS DE
%UNA PARTE FIJA (B2:D4, COMO EN goban), QUE QUEDAN EN #2. LA PARTE FIJA ES LA DE TODOS LOS TABLEROS, AUNQUE
%EL ARCHIVO TENGA VISTA.
\cs_new_protected:Npn \__pgfgo_sgf_partial:NNn #1#2#3 {
	\bool_set_false:N #1
	\tl_clear:N #2
	\str_case:nnF {#3} {
		{auto}	{\bool_set_true:N #1}
		{false}	{}
	}{
		\tl_set:Nn #2 {#3}
	}
}

%partial = auto EN \sgfdiagrams, \sgfproblem Y \sgfanimation: TODOS LOS TABLEROS TIENEN LA MISMA PARTE
%VISIBLE, LA QUE USAN LAS LINEAS QUE SE DIBUJAN: TODO EL ARBOL DEL ARCHIVO #1 (\__pgfgo_sgf_extent:n, EN
%\sgfproblem) O LAS LINEAS #2, SEPARADAS POR ; (\__pgfgo_sgf_extent:nn). \__pgfgo_sgf_extent_add: LA SUMA A LO
%DIBUJADO DENTRO DE CADA goban (SI EL goban TODAVIA TIENE partial = auto).
\tl_new:N \l__pgfgo_sgf_extent_tl
\cs_new_protected:Npn \__pgfgo_sgf_extent:n #1 {
	\pgfgo_kernel_sgf_tree:n {#1}
	\tl_set_eq:NN \l__pgfgo_sgf_extent_tl \l_pgfgo_kernel_sgf_extent_tl
}
\cs_new_protected:Npn \__pgfgo_sgf_extent:nn #1#2 {
	\pgfgo_kernel_sgf_extent:nn {#1} {#2}
	\tl_set_eq:NN \l__pgfgo_sgf_extent_tl \l_pgfgo_kernel_sgf_extent_tl
}
\cs_generate_variant:Nn \__pgfgo_sgf_extent:nn {nV}
\cs_new_protected:Npn \__pgfgo_sgf_extent_add: {
	\bool_lazy_and:nnT {\l_pgfgo_goban_partial_auto_bool} {! \tl_if_empty_p:N \l__pgfgo_sgf_extent_tl}
		{\exp_after:wN \__pgfgo_sgf_extent_add:nnnn \l__pgfgo_sgf_extent_tl}
}
\cs_new_protected:Npn \__pgfgo_sgf_extent_add:nnnn #1#2#3#4 {
	\pgfgo_kernel_extent_add:nn {#1} {#2}
	\pgfgo_kernel_extent_add:nn {#3} {#4}
}

%VERDADERO SI EL EVENTO {#1}{#2}{#3} DE \l_pgfgo_kernel_sgf_moves_seq ES UNA JUGADA (NO UN CAMBIO DE UN NODO
%NI UN NUMERO).
\prg_new_conditional:Npnn \__pgfgo_sgf_if_move:nnn #1#2#3 {T} {
	\str_case:nnF {#1} {
		{black}	{\prg_return_true:}
		{white}	{\prg_return_true:}
	}{
		\prg_return_false:
	}
}

%DEJA EN #1 LA CANTIDAD DE JUGADAS DE LA ULTIMA PARTIDA LEIDA, SIN CONTAR MAS DE #2 (DEJA DE RECORRER AHI).
\cs_new_protected:Npn \__pgfgo_sgf_count_moves:Nn #1#2 {
	\int_zero:N #1
	\int_compare:nNnT {#2} > {0} {
		\seq_map_inline:Nn \l_pgfgo_kernel_sgf_moves_seq {
			\__pgfgo_sgf_if_move:nnnT ##1 {
				\int_incr:N #1
				\int_compare:nNnF {#1} < {#2} {\seq_map_break:}
			}
		}
	}
}

%DEJA EN #1 EL NUMERO DE LA JUGADA #2 (SU POSICION EN EL ARCHIVO) DE LA ULTIMA PARTIDA LEIDA: EL QUE SIGUE A
%MN, SIN restart.
\int_new:N \l__pgfgo_sgf_moves_seen_int
\cs_new_protected:Npn \__pgfgo_sgf_move_number:Nn #1#2 {
	\int_zero:N #1
	\int_zero:N \l__pgfgo_sgf_moves_seen_int
	\seq_map_inline:Nn \l_pgfgo_kernel_sgf_moves_seq {\__pgfgo_sgf_move_number:Nnnnn #1 {#2} ##1}
}
\cs_new_protected:Npn \__pgfgo_sgf_move_number:Nnnnn #1#2#3#4#5 {
	\str_if_eq:nnTF {#3} {number}
		{\int_set:Nn #1 {#4 - 1}}
		{
			\__pgfgo_sgf_if_move:nnnT {#3} {#4} {#5} {
				\int_incr:N #1
				\int_incr:N \l__pgfgo_sgf_moves_seen_int
				\int_compare:nNnF {\l__pgfgo_sgf_moves_seen_int} < {#2} {\seq_map_break:}
			}
		}
}


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%------------------------------------------\sgf-------------------------------------------------%
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%\sgf[from = <n>, to = <m>]{<archivo>} DIBUJA UNA PARTIDA EN EL goban ACTUAL. SOLO CON kernel = lua.
%LAS PIEDRAS INICIALES (AB, AW) SON PIEDRAS COMO LAS DE \stones. LAS JUGADAS SON COMO LAS DE \moves:
%ANTES DE from SIN NUMERO, DESDE from NUMERADAS, Y DESPUES DE to NO SE JUEGAN. AL TERMINAR, EL NUMERO
%Y EL TURNO QUEDAN LISTOS PARA SEGUIR LA PARTIDA CON \moves.

%from Y to SON POSICIONES DE JUGADA EN EL ARCHIVO (1, 2, 3...). EL NUMERO QUE SE MUESTRA PUEDE SER OTRO:
%MN LO CAMBIA, Y restart LO REINICIA EN CADA TRAMO DE step JUGADAS (VER MAS ABAJO). restart = auto Y
%numbers = auto HACEN LO QUE DICE PM: CON PM[2] SE REINICIA CADA 100, Y CON PM[0] NO SE NUMERA.
\int_new:N \l__pgfgo_sgf_from_int
\int_new:N \l__pgfgo_sgf_to_int
\tl_new:N \l__pgfgo_sgf_last_mark_tl

%LA CLAVE to: #1 = #3, O #2 SI #3 ES last O UN NUMERO NEGATIVO (HASTA LA ULTIMA JUGADA).
\cs_new_protected:Npn \__pgfgo_sgf_set_to:Nnn #1#2#3 {
	\str_if_eq:nnTF {#3} {last}
		{\int_set:Nn #1 {#2}}
		{
			\int_compare:nNnTF {#3} < {0}
				{\int_set:Nn #1 {#2}}
				{\int_set:Nn #1 {#3}}
		}
}
\tl_new:N \l__pgfgo_sgf_variation_tl
\bool_new:N \l__pgfgo_sgf_marks_bool
\tl_new:N \l__pgfgo_sgf_numbers_tl
\tl_new:N \l__pgfgo_sgf_variations_tl
\tl_new:N \l__pgfgo_sgf_file_tl
%restart Y numbers YA RESUELTOS (CON auto, SEGUN PM). restart: 0, NO SE REINICIA; 1, EN CADA TRAMO DE step;
%2, CADA 100 (PM[2]).
\int_new:N \l__pgfgo_sgf_restart_int
\bool_new:N \l__pgfgo_sgf_numbers_bool
%POSICION DE LA JUGADA EN EL ARCHIVO, NUMERO SIN REINICIAR (SIGUE A MN) Y NUMERO QUE SE MUESTRA.
\int_new:N \l__pgfgo_sgf_count_int
\int_new:N \l__pgfgo_sgf_number_int
\int_new:N \l__pgfgo_sgf_shown_int
%LA ULTIMA JUGADA QUE SE MUESTRA.
\int_new:N \l__pgfgo_sgf_last_int
%SI LA JUGADA QUE SE DIBUJA LLEVA NUMERO.
\bool_new:N \l__pgfgo_sgf_numbered_bool
%LO USA \sgfdiagrams: DESDE from, LAS PIEDRAS CAPTURADAS NO SE QUITAN DEL DIBUJO.
\bool_new:N \l__pgfgo_sgf_keep_numbered_bool
%LO USA \sgfdiagrams: SI NO ESTA VACIO, LA JUGADA from SE MUESTRA CON ESE NUMERO, Y LAS SIGUIENTES SIGUEN
%DESDE AHI (SE SUMA \l__pgfgo_sgf_shift_int AL NUMERO).
\tl_new:N \l__pgfgo_sgf_first_tl
\int_new:N \l__pgfgo_sgf_shift_int
%LAS ANIMACIONES SOLO COMPRUEBAN EL TAMANO EN EL PRIMER CUADRO.
\bool_new:N \l__pgfgo_sgf_check_size_bool
\bool_set_true:N \l__pgfgo_sgf_check_size_bool
%LAS MARCAS Y LAS VARIANTES DE LA ULTIMA JUGADA QUE SE MUESTRA, "x,y" DE LOS PUNTOS QUE MARCAN (LES QUITAN
%EL NUMERO) Y DE LOS QUE TIENEN UNA ETIQUETA DE LB (NO SE LO QUITAN).
\seq_new:N \l__pgfgo_sgf_marks_seq
\seq_new:N \l__pgfgo_sgf_variations_seq
\prop_new:N \g__pgfgo_sgf_marked_prop
\prop_new:N \g__pgfgo_sgf_labeled_prop
%"x,y" DE LAS JUGADAS NUMERADAS (ANTES DE LAS MARCAS).
\prop_new:N \l__pgfgo_sgf_numbered_prop
\tl_new:N \l__pgfgo_sgf_mark_tl
\bool_new:N \l__pgfgo_sgf_remove_warned_bool

%LA NUMERACION DE \sgf, \sgfanimation Y \sgfdiagrams. LAS JUGADAS VAN EN TRAMOS DE step (UNA LISTA REPITE
%EL ULTIMO TAMANO; EN \sgfdiagrams, CADA TRAMO ES UN DIAGRAMA). restart: true, DESDE EL SEGUNDO TRAMO CADA
%UNO NUMERA DESDE from; false, LOS NUMEROS DE LA PARTIDA; auto, LO QUE PIDE PM (CON PM[2], CADA 100).
%from TAMBIEN PRENDE restart. #1: EL ARBOL DE CLAVES, #2: EL PREFIJO DE LAS VARIABLES, #3: step INICIAL.
%CLAVES: /pgfgo/{sgf, sgf animation, sgf diagrams}/{step, restart}
%CLAVES: /pgfgo/{sgf, sgf animation, sgf diagrams}/restart/{true, false, auto, from}
\cs_new_protected:Npn \__pgfgo_sgf_numbering_keys:nnn #1#2#3 {
	\clist_new:c {l__pgfgo_ #2 _step_clist}
	\tl_new:c {l__pgfgo_ #2 _restart_tl}
	\int_new:c {l__pgfgo_ #2 _restart_from_int}
	\keys_define:nn {#1} {
		step				.clist_set:c	= {l__pgfgo_ #2 _step_clist},
		step				.initial:n		= {#3},
		restart			.code:n				= {\keys_set:nn {#1 / restart} {##1}},
		restart			.default:n		= {true},
	}
	\keys_define:nn {#1 / restart} {
		true				.code:n				= {\tl_set:cn {l__pgfgo_ #2 _restart_tl} {true}},
		false				.code:n				= {\tl_set:cn {l__pgfgo_ #2 _restart_tl} {false}},
		auto				.code:n				= {\tl_set:cn {l__pgfgo_ #2 _restart_tl} {auto}},
		from				.code:n				= {
															\tl_set:cn {l__pgfgo_ #2 _restart_tl} {true}
															\int_set:cn {l__pgfgo_ #2 _restart_from_int} {##1}
														},
	}
	\tl_set:cn {l__pgfgo_ #2 _restart_tl} {auto}
	\int_set:cn {l__pgfgo_ #2 _restart_from_int} {1}
}
\__pgfgo_sgf_numbering_keys:nnn {pgfgo / sgf} {sgf} {100}

\keys_define:nn {pgfgo / sgf} {
	from				.int_set:N	= \l__pgfgo_sgf_from_int,
	from				.initial:n	= {1},
	%last (O UN NUMERO NEGATIVO): HASTA LA ULTIMA JUGADA.
	to					.code:n			= {\__pgfgo_sgf_set_to:Nnn \l__pgfgo_sgf_to_int {\c_max_int} {#1}},
	to					.initial:n	= {last},
	%OPCIONES DE UNA MARCA PARA LA ULTIMA JUGADA QUE SE MUESTRA. false: SIN MARCA.
	last~mark		.code:n			= {
												\str_if_eq:nnTF {#1} {false}
													{\tl_clear:N \l__pgfgo_sgf_last_mark_tl}
													{\tl_set:Nn \l__pgfgo_sgf_last_mark_tl {#1}}
											},
	last~mark		.initial:n	= {false},
	%2.1: EN LA PRIMERA BIFURCACION, LA SEGUNDA VARIANTE; EN LA SEGUNDA, LA PRIMERA.
	variation		.tl_set:N		= \l__pgfgo_sgf_variation_tl,
	marks				.bool_set:N	= \l__pgfgo_sgf_marks_bool,
	marks				.default:n	= {true},
	marks				.initial:n	= {true},
	numbers			.choices:nn	= {true, false, auto}
		{\tl_set_eq:NN \l__pgfgo_sgf_numbers_tl \l_keys_choice_tl},
	numbers			.default:n	= {true},
	numbers			.initial:n	= {auto},
	%LA PARTIDA DEL ARCHIVO (1 ES LA PRIMERA).
	game				.code:n			= {\int_set:Nn \l_pgfgo_kernel_sgf_game_int {#1}},
	%LAS VARIANTES DE LA ULTIMA JUGADA, COMO LETRAS: none, children, siblings O auto (LO QUE DICE ST).
	variations	.choices:nn	= {none, children, siblings, auto}
		{\tl_set_eq:NN \l__pgfgo_sgf_variations_tl \l_keys_choice_tl},
	variations	.default:n	= {auto},
	variations	.initial:n	= {none},
}

%\pgfgoset{sgf = {...}} FIJA LAS OPCIONES DE TODOS LOS \sgf (Y LA PARTIDA DE LOS DEMAS COMANDOS).
%sgf charset: LA CODIFICACION DE LOS ARCHIVOS QUE NO SON UTF-8 (auto: LA DE CA). sgf syntax: LA SINTAXIS DE
%LOS ARCHIVOS (auto: LA QUE PARECE; VER pgf-go-kernel.sty).
\keys_define:nn {pgfgo} {
	sgf					.code:n			= {\keys_set:nn {pgfgo / sgf} {#1}},
	sgf~charset	.tl_set:N		= \l_pgfgo_kernel_sgf_charset_tl,
	sgf~syntax	.tl_set:N		= \l_pgfgo_kernel_sgf_syntax_tl,
}

\msg_new:nnn {pgfgo} {sgf-size}
	{The~game~in~'#1'~is~for~a~#2~board,~but~the~goban~is~#3.}
%AE: SOLO SE PUEDE QUITAR UNA PIEDRA CON goban/captures (LAS PIEDRAS SE DIBUJAN AL FINAL). SIN CAPTURAS,
%\sgf AVISA UNA VEZ.
\msg_new:nnn {pgfgo} {sgf-remove}
	{'#1'~removes~stones~(AE).~That~needs~goban/captures,~so~they~are~not~removed.}


%PIEDRAS INICIALES. #1: black O white. #2: LISTA DE {x}{y}.
\cs_new_protected:Npn \__pgfgo_sgf_stones:nn #1#2 {
	\tl_if_blank:nF {#2} {
		\bool_if:NT \l__pgfgo_sgf_cache_bool {\clist_map_inline:nn {#2} {\__pgfgo_sgf_cache_outside:nn ##1}}
		\pgfgo_remember:Nnn \l_pgfgo_goban_remember_stone_bool {stone}
			{\exp_not:N \pgfgo_stones_parsed:nn {#1} {\exp_not:n {#2}}}
		\pgfgo_stones_parsed:nn {#1} {#2}
	}
}
\cs_generate_variant:Nn \__pgfgo_sgf_stones:nn {nV}

%LAS PIEDRAS INICIALES DE #1 (black O white), DE LA SECUENCIA #2 DEL KERNEL.
\cs_new_protected:Npn \__pgfgo_sgf_setup_stones:nN #1#2 {
	\clist_set_from_seq:NN \l_tmpa_clist #2
	\__pgfgo_sgf_stones:nV {#1} \l_tmpa_clist
}

%UN EVENTO DE LA PARTIDA: UNA JUGADA ({black | white}{x}{y}), UN CAMBIO DE UN NODO POSTERIOR A LA
%PRIMERA JUGADA ({add-black | add-white | remove}{x}{y}), UN NUMERO DE JUGADA ({number}{n}{}, POR MN) O
%UN TURNO ({player}{black | white}{}, POR PL). LAS JUGADAS, QUE SON LA MAYORIA, SE PRUEBAN PRIMERO.
\cs_new_protected:Npn \__pgfgo_sgf_event:nnn #1#2#3 {
	\str_case:nnF {#1} {
		{black}			{\__pgfgo_sgf_move:nnn {black} {#2} {#3}}
		{white}			{\__pgfgo_sgf_move:nnn {white} {#2} {#3}}
		{add-black}	{\__pgfgo_sgf_stones:nn {black} {{#2}{#3}}}
		{add-white}	{\__pgfgo_sgf_stones:nn {white} {{#2}{#3}}}
		{remove}		{\__pgfgo_sgf_remove:nn {#2} {#3}}
		{number}		{\int_set:Nn \l__pgfgo_sgf_number_int {#2 - 1}}
		{player}		{\pgfgo_kernel_move_set_player:n {#2}}
	}{
		\__pgfgo_sgf_move:nnn {#1} {#2} {#3}
	}
}

\cs_new_protected:Npn \__pgfgo_sgf_remove:nn #1#2 {
	\bool_if:nTF {\l_pgfgo_goban_captures_bool && ! \l_pgfgo_captures_collect_bool} {
		\pgfgo_remember:Nnn \l_pgfgo_goban_remember_stone_bool {stone}
			{\exp_not:N \pgfgo_captures_remove:nn {#1} {#2}}
		\pgfgo_captures_remove:nn {#1} {#2}
	}{
		\bool_if:NF \l__pgfgo_sgf_remove_warned_bool {
			\msg_warning:nnV {pgfgo} {sgf-remove} \l__pgfgo_sgf_file_tl
			\bool_set_true:N \l__pgfgo_sgf_remove_warned_bool
		}
	}
}

%EL NUMERO QUE SE MUESTRA DE CADA JUGADA DIBUJADA (CON restart NO ES EL DE LA PARTIDA), PARA LOS COMENTARIOS:
%\__pgfgo_sgf_shown_<JUGADA>: (UN prop SERIA CUADRATICO EN LAS PARTIDAS LARGAS) Y LA MAYOR JUGADA GUARDADA.
\int_new:N \g__pgfgo_sgf_shown_max_int
\cs_new_protected:Npn \__pgfgo_sgf_shown_clear: {
	\int_step_inline:nn {\g__pgfgo_sgf_shown_max_int} {\cs_undefine:c {__pgfgo_sgf_shown_ ##1 :}}
	\int_gzero:N \g__pgfgo_sgf_shown_max_int
}

%UNA JUGADA DE #1 (black O white) EN (#2,#3). x E y VACIOS: PASE.
\cs_new_protected:Npn \__pgfgo_sgf_move:nnn #1#2#3 {
	\bool_if:NT \l__pgfgo_sgf_cache_bool {
		\bool_lazy_and:nnT
			{\int_compare_p:nNn {\l__pgfgo_sgf_count_int + 1} = {\l__pgfgo_sgf_from_int}}
			{! \int_compare_p:nNn {\l__pgfgo_sgf_from_int} > {\l__pgfgo_sgf_to_int}}
			{\__pgfgo_sgf_save:nn {a} {\l__pgfgo_sgf_index_int}}
	}
	\int_incr:N \l__pgfgo_sgf_count_int
	\int_compare:nNnTF {\l__pgfgo_sgf_count_int} > {\l__pgfgo_sgf_to_int} {
		\int_decr:N \l__pgfgo_sgf_count_int
		\int_set_eq:NN \l__pgfgo_sgf_resume_int \l__pgfgo_sgf_index_int
		\seq_map_break:
	}{
		\int_incr:N \l__pgfgo_sgf_number_int
		\bool_lazy_and:nnT
			{! \tl_if_empty_p:N \l__pgfgo_sgf_first_tl}
			{\int_compare_p:nNn {\l__pgfgo_sgf_count_int} = {\l__pgfgo_sgf_from_int}}
			{\int_set:Nn \l__pgfgo_sgf_shift_int {\l__pgfgo_sgf_first_tl - \l__pgfgo_sgf_number_int}}
		\int_compare:nNnT {\l__pgfgo_sgf_restart_int} = {1} {\__pgfgo_sgf_block:n {\l__pgfgo_sgf_number_int}}
		\int_set:Nn \l__pgfgo_sgf_shown_int {
			\int_case:nnF {\l__pgfgo_sgf_restart_int}
				{
					{1} {
						\int_compare:nNnTF {\l__pgfgo_sgf_block_int} = {1}
							{\l__pgfgo_sgf_number_int}
							{\l__pgfgo_sgf_restart_from_int + \l__pgfgo_sgf_number_int - \l__pgfgo_sgf_block_int}
					}
					{2} {\int_mod:nn {\l__pgfgo_sgf_number_int - 1} {100} + 1}
				}
				{\l__pgfgo_sgf_number_int + \l__pgfgo_sgf_shift_int}
		}
		\pgfgo_kernel_move_set_number:n {\l__pgfgo_sgf_shown_int}
		\cs_gset:cpe {__pgfgo_sgf_shown_ \int_use:N \l__pgfgo_sgf_count_int :} {\int_use:N \l__pgfgo_sgf_shown_int}
		\int_gset:Nn \g__pgfgo_sgf_shown_max_int {\int_max:nn {\g__pgfgo_sgf_shown_max_int} {\l__pgfgo_sgf_count_int}}
		\pgfgo_kernel_move_set_player:n {#1}
		\tl_if_blank:nTF {#2} {
			%UN PASE CUENTA, PERO NO SE DIBUJA. CON goban/notes, SI SE NUMERARIA, SE ANOTA ("N: pass"), SALVO LOS
			%QUE TERMINAN LA LINEA (#3 = end).
			\bool_lazy_all:nT {
				{\l_pgfgo_goban_notes_bool} {\l__pgfgo_sgf_numbers_bool} {\tl_if_empty_p:n {#3}}
				{! \int_compare_p:nNn {\l__pgfgo_sgf_count_int} < {\l__pgfgo_sgf_from_int}}
			} {\pgfgo_notes_pass:}
			\pgfgo_kernel_move_set_number:n {\l__pgfgo_sgf_shown_int + 1}
			\pgfgo_kernel_move_set_player:n {\str_if_eq:nnTF {#1} {black} {white} {black}}
		}{
			\__pgfgo_sgf_stone:nnn {#1} {#2} {#3}
		}
	}
}

%LA PIEDRA DE UNA JUGADA. SIN NUMERO ANTES DE from, Y TAMPOCO SI UNA MARCA DEL ARCHIVO CAE EN ESE PUNTO
%(LA MARCA LO REEMPLAZA).
\cs_new_protected:Npn \__pgfgo_sgf_stone:nnn #1#2#3 {
	\bool_set:Nn \l__pgfgo_sgf_numbered_bool
		{! \int_compare_p:nNn {\l__pgfgo_sgf_count_int} < {\l__pgfgo_sgf_from_int}}
	\bool_set:Nn \l__pgfgo_captures_keep_bool
		{\l__pgfgo_sgf_keep_numbered_bool && \l__pgfgo_sgf_numbered_bool}
	\__pgfgo_captures_key:nn {#2} {#3}
	\bool_if:NT \l__pgfgo_sgf_cache_bool {\__pgfgo_sgf_cache_outside:nn {#2} {#3}}
	\bool_if:nT {\l__pgfgo_sgf_numbers_bool && \l__pgfgo_sgf_numbered_bool}
		{\prop_put:NVn \l__pgfgo_sgf_numbered_prop \l__pgfgo_captures_key_tl {}}
	\bool_set:Nn \l__pgfgo_sgf_numbered_bool {
		\l__pgfgo_sgf_numbers_bool && \l__pgfgo_sgf_numbered_bool &&
		! \prop_if_in_p:NV \g__pgfgo_sgf_marked_prop \l__pgfgo_captures_key_tl
	}
	\pgfgo_remember:Nnn \l_pgfgo_goban_remember_move_bool {stone} {
		\bool_if:NF \l_pgfgo_goban_remember_move_label_bool {\exp_not:N \pgfgo_remember_numbers:n}
		{
			\__pgfgo_sgf_move_code:nnnn
				{\bool_if:NTF \l__pgfgo_sgf_numbered_bool {\exp_not:N \BooleanTrue} {\exp_not:N \BooleanFalse}}
				{#1} {#2} {#3}
		}
	}
	\bool_if:NTF \l__pgfgo_sgf_numbered_bool
		{\pgfgo_move:nnnn {\BooleanTrue} {} {#2} {#3}}
		{\pgfgo_move:nnnn {\BooleanFalse} {} {#2} {#3}}
}

%EL CODIGO QUE VUELVE A DIBUJAR LA JUGADA DE #2 EN (#3,#4) (#1: NUMERADA). PARA UNA EXPANSION e.
\cs_new:Npn \__pgfgo_sgf_move_code:nnnn #1#2#3#4 {
	\exp_not:N \pgfgo_move_parsed:nnn {#1} {from = \int_use:N \l__pgfgo_sgf_shown_int, #2} {{#3}{#4}}
}

%MARCAS DEL ARCHIVO (TR, SQ, CR, MA, LB; TB Y TW SON TERRITORIO): #1 FORMA, (#2,#3) PUNTO, #4 COLOR DE LA
%PIEDRA (black, white O neutral, PARA QUE LA MARCA SE VEA), #5 TEXTO DE LB.
\cs_new_protected:Npn \__pgfgo_sgf_mark:nnnnn #1#2#3#4#5 {
	\str_case:nnF {#1} {
		{black-territory}	{\__pgfgo_sgf_territory:nnn {black} {#2} {#3}}
		{white-territory}	{\__pgfgo_sgf_territory:nnn {white} {#2} {#3}}
		{selected}				{\__pgfgo_sgf_mark_draw:nnnnn {filled~square} {#2} {#3} {#4} {#5}}
	}{
		\__pgfgo_sgf_mark_draw:nnnnn {#1} {#2} {#3} {#4} {#5}
	}
}

%TB Y TW: TERRITORIO DE #1 EN (#2,#3), COMO EL DE \territory (CUENTA PARA \pgfgoscore). UNA PIEDRA DEL
%RIVAL EN ESE PUNTO ESTA MUERTA.
\cs_new_protected:Npn \__pgfgo_sgf_territory:nnn #1#2#3 {
	\__pgfgo_captures_key:nn {#2} {#3}
	\prop_get:NVNT \g_pgfgo_points_prop \l__pgfgo_captures_key_tl \l__pgfgo_sgf_mark_tl {
		\str_if_eq:eeT {\l__pgfgo_sgf_mark_tl} {\str_if_eq:nnTF {#1} {black} {white} {black}}
			{\prop_gput:NVe \g_pgfgo_points_prop \l__pgfgo_captures_key_tl {dead- \l__pgfgo_sgf_mark_tl}}
	}
	\pgfgo_remember:Nnn \l_pgfgo_goban_remember_territory_bool {territory}
		{\exp_not:N \pgfgo_territory_parsed:nnnn {#1} {\l__pgfgo_territory_draw_tl} {} {{#2}{#3}}}
	\pgfgo_territory_parsed:nVnn {#1} \l__pgfgo_territory_draw_tl {} {{#2}{#3}}
}

\cs_generate_variant:Nn \prop_if_in:NnF {NV}

%VERDADERO SI EL ARCHIVO MARCA (#1,#2), CON UNA FORMA O UNA ETIQUETA. DEJA LISTO \l__pgfgo_captures_key_tl.
\prg_new_protected_conditional:Npnn \__pgfgo_sgf_if_file_marked:nn #1#2 {F} {
	\__pgfgo_captures_key:nn {#1} {#2}
	\bool_lazy_or:nnTF
		{\prop_if_in_p:NV \g__pgfgo_sgf_marked_prop \l__pgfgo_captures_key_tl}
		{\prop_if_in_p:NV \g__pgfgo_sgf_labeled_prop \l__pgfgo_captures_key_tl}
		{\prg_return_true:} {\prg_return_false:}
}

%UNA ETIQUETA NO TAPA EL NUMERO DE UNA JUGADA.
\cs_new_protected:Npn \__pgfgo_sgf_mark_draw:nnnnn #1#2#3#4#5 {
	\str_if_eq:nnTF {#1} {label}
		{\__pgfgo_sgf_if_numbered_shown:nnF {#2} {#3} {\__pgfgo_sgf_mark_show:nnnnn {#1} {#2} {#3} {#4} {#5}}}
		{\__pgfgo_sgf_mark_show:nnnnn {#1} {#2} {#3} {#4} {#5}}
}
\cs_new_protected:Npn \__pgfgo_sgf_mark_show:nnnnn #1#2#3#4#5 {
	\tl_set:Ne \l__pgfgo_sgf_mark_tl {
		#4,
		\str_if_eq:nnTF {#1} {label}
			{custom = {\pgfgo_kernel_sgf_label:n {#5}}}
			{#1}
	}
	\__pgfgo_sgf_mark_put:Vn \l__pgfgo_sgf_mark_tl {{#2}{#3}}
}

%DIBUJA (Y RECUERDA) LA MARCA DE OPCIONES #1 EN EL PUNTO #2 ({x}{y}).
\cs_new_protected:Npn \__pgfgo_sgf_mark_put:nn #1#2 {
	\pgfgo_remember:Nnn \l_pgfgo_goban_remember_mark_bool {mark}
		{\exp_not:N \pgfgo_marks_parsed:nn {\exp_not:n {#1}} {#2}}
	\pgfgo_marks_parsed:nn {#1} {#2}
}
\cs_generate_variant:Nn \__pgfgo_sgf_mark_put:nn {Vn}

%LA LETRA #4 DE UNA VARIANTE EN (#1,#2), EN EL COLOR #3 DE LA PIEDRA QUE HAY AHI.
\cs_new_protected:Npn \__pgfgo_sgf_variation:nnnn #1#2#3#4 {
	\__pgfgo_sgf_mark_put:nn {#3, custom = {#4}} {{#1}{#2}}
}

%FLECHAS Y LINEAS DEL ARCHIVO (AR, LN): #1 arrow O line, DE (#2,#3) A (#4,#5).
\cs_new_protected:Npn \__pgfgo_sgf_line:nnnnn #1#2#3#4#5 {
	\pgfgo_remember:Nnn \l_pgfgo_goban_remember_mark_bool {#1}
		{\exp_not:N \pgfgo_line_parsed:nnnnnn {#1} {} {#2} {#3} {#4} {#5}}
	\pgfgo_line_parsed:nnnnnn {#1} {} {#2} {#3} {#4} {#5}
}

%LOS PUNTOS QUE MARCA EL ULTIMO NODO QUE SE MUESTRA. LOS PUNTOS ATENUADOS Y LAS ETIQUETAS NO REEMPLAZAN EL
%NUMERO DE LA JUGADA.
\cs_new_protected:Npn \__pgfgo_sgf_marked_point:nnnnn #1#2#3#4#5 {
	\__pgfgo_captures_key:nn {#2} {#3}
	\str_case:nnF {#1} {
		{dim}		{}
		{label}	{\prop_gput:NVn \g__pgfgo_sgf_labeled_prop \l__pgfgo_captures_key_tl {}}
	}{
		\prop_gput:NVn \g__pgfgo_sgf_marked_prop \l__pgfgo_captures_key_tl {}
	}
}

%VERDADERO SI EN (#1,#2) SE VE UNA JUGADA NUMERADA (CON CAPTURAS, SI NO FUE CAPTURADA O SI SE CONSERVA).
\prg_new_protected_conditional:Npnn \__pgfgo_sgf_if_numbered_shown:nn #1#2 {F} {
	\__pgfgo_captures_key:nn {#1} {#2}
	\bool_lazy_and:nnTF
		{\prop_if_in_p:NV \l__pgfgo_sgf_numbered_prop \l__pgfgo_captures_key_tl}
		{
			! \l_pgfgo_goban_captures_bool ||
			\prop_if_in_p:NV \g__pgfgo_captures_pending_prop \l__pgfgo_captures_key_tl
		}
		{\prg_return_true:} {\prg_return_false:}
}

%restart Y numbers SEGUN LA OPCION Y, CON auto, SEGUN PM.
\cs_new_protected:Npn \__pgfgo_sgf_numbering: {
	\int_zero:N \l__pgfgo_sgf_restart_int
	\str_if_eq:VnT \l__pgfgo_sgf_restart_tl {true} {\int_set:Nn \l__pgfgo_sgf_restart_int {1}}
	\str_if_eq:VnT \l__pgfgo_sgf_restart_tl {auto} {
		\int_compare:nNnT {\l_pgfgo_kernel_sgf_print_int} = {2} {\int_set:Nn \l__pgfgo_sgf_restart_int {2}}
	}
	\clist_if_empty:NT \l__pgfgo_sgf_step_clist {\clist_set:Nn \l__pgfgo_sgf_step_clist {100}}
	\bool_set:Nn \l__pgfgo_sgf_numbers_bool {
		\str_if_eq_p:Vn \l__pgfgo_sgf_numbers_tl {true} ||
		(\str_if_eq_p:Vn \l__pgfgo_sgf_numbers_tl {auto} &&
			! \int_compare_p:nNn {\l_pgfgo_kernel_sgf_print_int} = {0})
	}
}

%EN \l__pgfgo_sgf_block_int, LA PRIMERA JUGADA DEL TRAMO DE step EN QUE CAE EL NUMERO #1. LOS TRAMOS QUE
%REPITEN EL ULTIMO TAMANO DE LA LISTA SE SALTAN DE UNA VEZ.
\int_new:N \l__pgfgo_sgf_block_int
\int_new:N \l__pgfgo_sgf_block_size_int
\int_new:N \l__pgfgo_sgf_block_index_int
\cs_new_protected:Npn \__pgfgo_sgf_block:n #1 {
	\int_set:Nn \l__pgfgo_sgf_block_int {1}
	\int_set:Nn \l__pgfgo_sgf_block_index_int {1}
	\__pgfgo_sgf_block_loop:n {#1}
}
\cs_new_protected:Npn \__pgfgo_sgf_block_loop:n #1 {
	\int_set:Nn \l__pgfgo_sgf_block_size_int {
		\int_max:nn {1} {
			\clist_item:Nn \l__pgfgo_sgf_step_clist
				{\int_min:nn {\l__pgfgo_sgf_block_index_int} {\clist_count:N \l__pgfgo_sgf_step_clist}}
		}
	}
	\int_compare:nNnT {#1} > {\l__pgfgo_sgf_block_int + \l__pgfgo_sgf_block_size_int - 1} {
		\int_compare:nNnTF {\l__pgfgo_sgf_block_index_int} < {\clist_count:N \l__pgfgo_sgf_step_clist}
			{
				\int_add:Nn \l__pgfgo_sgf_block_int {\l__pgfgo_sgf_block_size_int}
				\int_incr:N \l__pgfgo_sgf_block_index_int
				\__pgfgo_sgf_block_loop:n {#1}
			}
			{
				\int_add:Nn \l__pgfgo_sgf_block_int {
					\int_div_truncate:nn {#1 - \l__pgfgo_sgf_block_int} {\l__pgfgo_sgf_block_size_int}
						* \l__pgfgo_sgf_block_size_int
				}
			}
	}
}

%AVISA SI LA PARTIDA DEL ARCHIVO #1 NO ES DEL TAMANO DEL goban.
\cs_new_protected:Npn \__pgfgo_sgf_check_size:n #1 {
	\bool_lazy_and:nnF
		{\int_compare_p:nNn {\l_pgfgo_kernel_sgf_size_x_int} = {\l_pgfgo_goban_size_x_int}}
		{\int_compare_p:nNn {\l_pgfgo_kernel_sgf_size_y_int} = {\l_pgfgo_goban_size_y_int}}
		{
			\msg_warning:nnnee {pgfgo} {sgf-size} {#1}
				{\int_use:N \l_pgfgo_kernel_sgf_size_x_int x \int_use:N \l_pgfgo_kernel_sgf_size_y_int}
				{\int_use:N \l_pgfgo_goban_size_x_int x \int_use:N \l_pgfgo_goban_size_y_int}
		}
}

%LAS MARCAS Y LAS LETRAS DE LAS VARIANTES DE LA ULTIMA JUGADA QUE SE MUESTRA. SE AVERIGUAN ANTES DE JUGAR,
%PORQUE REEMPLAZAN LOS NUMEROS, Y SE DIBUJAN DESPUES.
\cs_new_protected:Npn \__pgfgo_sgf_marked: {
	\prop_gclear:N \g__pgfgo_sgf_marked_prop
	\prop_gclear:N \g__pgfgo_sgf_labeled_prop
	\seq_clear:N \l__pgfgo_sgf_marks_seq
	\bool_if:NT \l__pgfgo_sgf_marks_bool {
		\pgfgo_kernel_sgf_marks:n {\l__pgfgo_sgf_last_int}
		\seq_set_eq:NN \l__pgfgo_sgf_marks_seq \l_pgfgo_kernel_sgf_marks_seq
		\seq_map_inline:Nn \l__pgfgo_sgf_marks_seq {\__pgfgo_sgf_marked_point:nnnnn ##1}
	}
	\seq_clear:N \l__pgfgo_sgf_variations_seq
	\str_if_eq:VnF \l__pgfgo_sgf_variations_tl {none} {
		\exp_args:NnV \pgfgo_kernel_sgf_variations:nn {\l__pgfgo_sgf_last_int} \l__pgfgo_sgf_variations_tl
		\seq_set_eq:NN \l__pgfgo_sgf_variations_seq \l_pgfgo_kernel_sgf_variations_seq
		\seq_map_inline:Nn \l__pgfgo_sgf_variations_seq {\__pgfgo_sgf_marked_point:nnnnn {variation} ##1}
	}
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%CON \l__pgfgo_sgf_cache_bool (\sgfanimation Y \sgfdiagrams, QUE DIBUJAN MUCHOS TABLEROS DE LA MISMA
%PARTIDA) UN \sgf NO VUELVE A JUGAR LA PARTIDA DESDE EL PRINCIPIO: SIGUE DESDE LA POSICION QUE GUARDO
%UN \sgf ANTERIOR. HAY DOS COPIAS: a, ANTES DE LA PRIMERA JUGADA NUMERADA (from), Y b, DESPUES DE LA
%ULTIMA (to). CADA UNA TIENE LO QUE DEJARON LAS JUGADAS: EL TABLERO DEL KERNEL, LO QUE SE VA A DIBUJAR
%(LAS PIEDRAS, LAS ATENUADAS Y LAS MARCAS), LOS PUNTOS DE \pgfgoscore, LAS NOTAS "N at M" Y EL NUMERO.
%
%UNA COPIA DE c JUGADAS SIRVE SI ES DEL MISMO ARCHIVO, CON LAS MISMAS OPCIONES Y EL MISMO TABLERO (EL
%CONTEXTO), SI to NO ES MENOR QUE c, SI LAS JUGADAS 1 A c SON LAS MISMAS NUMERADAS (from IGUAL, O LOS DOS
%MAYORES QUE c), Y SI NINGUNA DE ESAS JUGADAS NUMERADAS CAE EN UN PUNTO QUE MARCA EL ULTIMO NODO (LA
%MARCA LE QUITA EL NUMERO). NO SE GUARDA NADA SI HUBO UN AVISO (PARA QUE CADA TABLERO AVISE IGUAL).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\bool_new:N \l__pgfgo_sgf_cache_bool
\tl_new:N \l__pgfgo_sgf_context_tl
%EL EVENTO QUE SE JUEGA, Y EL PRIMERO QUE NO SE JUGO (DONDE SIGUE UNA COPIA).
\int_new:N \l__pgfgo_sgf_index_int
\int_new:N \l__pgfgo_sgf_resume_int
\int_new:N \l__pgfgo_sgf_start_int
%SI UN PUNTO QUEDO FUERA DEL TABLERO.
\bool_new:N \l__pgfgo_sgf_outside_bool
\tl_new:N \l__pgfgo_sgf_slot_tl
\clist_map_inline:nn {a, b} {
	\tl_new:c {g__pgfgo_sgf_#1_context_tl}
	\int_new:c {g__pgfgo_sgf_#1_count_int}
	\int_new:c {g__pgfgo_sgf_#1_index_int}
	\int_new:c {g__pgfgo_sgf_#1_from_int}
	\int_new:c {g__pgfgo_sgf_#1_number_int}
	\int_new:c {g__pgfgo_sgf_#1_shift_int}
	\seq_new:c {g__pgfgo_sgf_#1_captured_seq}
	\seq_new:c {g__pgfgo_sgf_#1_notes_seq}
	\clist_map_inline:nn {numbered, pending, faded, marks, points, notes_number, notes_code}
		{\prop_new:c {g__pgfgo_sgf_#1_##1_prop}}
}

%BORRA LAS COPIAS (AL EMPEZAR CADA \sgfanimation O \sgfdiagrams).
\cs_new_protected:Npn \__pgfgo_sgf_cache_begin: {
	\bool_set_true:N \l__pgfgo_sgf_cache_bool
	\tl_gclear:c {g__pgfgo_sgf_a_context_tl}
	\tl_gclear:c {g__pgfgo_sgf_b_context_tl}
}

%UN PUNTO FUERA DEL TABLERO DA UN AVISO.
\cs_new_protected:Npn \__pgfgo_sgf_cache_outside:nn #1#2 {
	\bool_lazy_and:nnF
		{\int_compare_p:n {1 <= #1 <= \l_pgfgo_goban_size_x_int}}
		{\int_compare_p:n {1 <= #2 <= \l_pgfgo_goban_size_y_int}}
		{\bool_set_true:N \l__pgfgo_sgf_outside_bool}
}

%VERDADERO SI ALGUNA JUGADA NUMERADA DE LA PROP #1 CAE EN UN PUNTO MARCADO.
\prg_new_conditional:Npnn \__pgfgo_sgf_if_marked_conflict:N #1 {TF} {
	\bool_set_false:N \l_tmpa_bool
	\prop_map_inline:Nn \g__pgfgo_sgf_marked_prop {
		\prop_if_in:NnT #1 {##1} {\bool_set_true:N \l_tmpa_bool \prop_map_break:}
	}
	\bool_if:NTF \l_tmpa_bool {\prg_return_true:} {\prg_return_false:}
}
\prg_generate_conditional_variant:Nnn \__pgfgo_sgf_if_marked_conflict:N {c} {TF}

%EL CONTEXTO DEL \sgf QUE EMPIEZA (DESPUES DE LEER LA PARTIDA Y DE \__pgfgo_sgf_numbering:).
\cs_new_protected:Npn \__pgfgo_sgf_context: {
	\tl_set:Ne \l__pgfgo_sgf_context_tl {
		{\exp_not:V \l__pgfgo_sgf_file_tl}
		{\exp_not:V \l__pgfgo_sgf_variation_tl}
		{\exp_not:V \l_pgfgo_kernel_sgf_charset_tl}
		{\exp_not:V \l_pgfgo_kernel_sgf_syntax_tl}
		{
			\int_use:N \l_pgfgo_kernel_sgf_game_int ,
			\int_use:N \l_pgfgo_goban_size_x_int , \int_use:N \l_pgfgo_goban_size_y_int ,
			\int_use:N \l_pgfgo_goban_from_x_int , \int_use:N \l_pgfgo_goban_to_x_int ,
			\int_use:N \l_pgfgo_goban_from_y_int , \int_use:N \l_pgfgo_goban_to_y_int ,
			\int_use:N \l__pgfgo_sgf_restart_int ,
			\int_use:N \l__pgfgo_sgf_restart_from_int ,
			\clist_use:Nn \l__pgfgo_sgf_step_clist {;} ,
			\tl_use:N \l__pgfgo_sgf_first_tl
		}
		\bool_to_str:N \l_pgfgo_goban_captures_bool
		\bool_to_str:N \l_pgfgo_captures_collect_bool
		\bool_to_str:N \l_pgfgo_goban_captures_fade_bool
		\bool_to_str:N \l_pgfgo_goban_notes_bool
		\bool_to_str:N \l__pgfgo_sgf_numbers_bool
		\bool_to_str:N \l__pgfgo_sgf_keep_numbered_bool
	}
}

%GUARDA LA COPIA #1 (a O b), QUE SIGUE EN EL EVENTO #2.
\cs_new_protected:Npn \__pgfgo_sgf_save:nn #1#2 {
	\bool_if:nF {
		\g__pgfgo_captures_warned_bool || \l__pgfgo_sgf_remove_warned_bool || \l__pgfgo_sgf_outside_bool
	}{
		\__pgfgo_sgf_if_marked_conflict:NTF \l__pgfgo_sgf_numbered_prop {
			\tl_gclear:c {g__pgfgo_sgf_#1_context_tl}
		}{
			\tl_gset_eq:cN {g__pgfgo_sgf_#1_context_tl} \l__pgfgo_sgf_context_tl
			\int_gset_eq:cN {g__pgfgo_sgf_#1_count_int} \l__pgfgo_sgf_count_int
			\int_gset:cn {g__pgfgo_sgf_#1_index_int} {#2}
			\int_gset:cn {g__pgfgo_sgf_#1_from_int}
				{\int_min:nn {\l__pgfgo_sgf_from_int} {\l__pgfgo_sgf_count_int + 1}}
			\int_gset_eq:cN {g__pgfgo_sgf_#1_number_int} \l__pgfgo_sgf_number_int
			\int_gset_eq:cN {g__pgfgo_sgf_#1_shift_int} \l__pgfgo_sgf_shift_int
			\seq_gset_eq:cN {g__pgfgo_sgf_#1_captured_seq} \l_pgfgo_kernel_captured_seq
			\seq_gset_eq:cN {g__pgfgo_sgf_#1_notes_seq} \g_pgfgo_move_notes_seq
			\prop_gset_eq:cN {g__pgfgo_sgf_#1_numbered_prop} \l__pgfgo_sgf_numbered_prop
			\prop_gset_eq:cN {g__pgfgo_sgf_#1_pending_prop} \g__pgfgo_captures_pending_prop
			\prop_gset_eq:cN {g__pgfgo_sgf_#1_faded_prop} \g__pgfgo_captures_faded_prop
			\prop_gset_eq:cN {g__pgfgo_sgf_#1_marks_prop} \g__pgfgo_captures_marks_prop
			\prop_gset_eq:cN {g__pgfgo_sgf_#1_points_prop} \g_pgfgo_points_prop
			\prop_gset_eq:cN {g__pgfgo_sgf_#1_notes_number_prop} \g__pgfgo_notes_number_prop
			\prop_gset_eq:cN {g__pgfgo_sgf_#1_notes_code_prop} \g__pgfgo_notes_code_prop
			\pgfgo_kernel_board_save:n {sgf-#1}
		}
	}
}

%DEJA EN \l__pgfgo_sgf_slot_tl LA COPIA QUE SIRVE (LA DE MAS JUGADAS), O NADA.
\cs_new_protected:Npn \__pgfgo_sgf_choose: {
	\tl_clear:N \l__pgfgo_sgf_slot_tl
	\clist_map_inline:nn {a, b} {
		\bool_lazy_all:nT {
			{\tl_if_eq_p:Nc \l__pgfgo_sgf_context_tl {g__pgfgo_sgf_##1_context_tl}}
			{! \int_compare_p:nNn {\int_use:c {g__pgfgo_sgf_##1_count_int}} > {\l__pgfgo_sgf_to_int}}
			{
				\int_compare_p:nNn {\int_use:c {g__pgfgo_sgf_##1_from_int}} =
					{\int_min:nn {\l__pgfgo_sgf_from_int} {\int_use:c {g__pgfgo_sgf_##1_count_int} + 1}}
			}
			{
				\bool_lazy_or_p:nn
					{\tl_if_empty_p:N \l__pgfgo_sgf_slot_tl}
					{
						\int_compare_p:nNn {\int_use:c {g__pgfgo_sgf_##1_count_int}}
							> {\int_use:c {g__pgfgo_sgf_ \l__pgfgo_sgf_slot_tl _count_int}}
					}
			}
		}{
			\__pgfgo_sgf_if_marked_conflict:cTF {g__pgfgo_sgf_##1_numbered_prop}
				{} {\tl_set:Nn \l__pgfgo_sgf_slot_tl {##1}}
		}
	}
}

%VUELVE A LA COPIA #1.
\cs_new_protected:Npn \__pgfgo_sgf_restore:n #1 {
	\int_set_eq:Nc \l__pgfgo_sgf_count_int {g__pgfgo_sgf_#1_count_int}
	\int_set_eq:Nc \l__pgfgo_sgf_number_int {g__pgfgo_sgf_#1_number_int}
	\int_set_eq:Nc \l__pgfgo_sgf_shift_int {g__pgfgo_sgf_#1_shift_int}
	\int_set_eq:Nc \l__pgfgo_sgf_start_int {g__pgfgo_sgf_#1_index_int}
	\seq_set_eq:Nc \l_pgfgo_kernel_captured_seq {g__pgfgo_sgf_#1_captured_seq}
	\seq_gset_eq:Nc \g_pgfgo_move_notes_seq {g__pgfgo_sgf_#1_notes_seq}
	\prop_set_eq:Nc \l__pgfgo_sgf_numbered_prop {g__pgfgo_sgf_#1_numbered_prop}
	\prop_gset_eq:Nc \g__pgfgo_captures_pending_prop {g__pgfgo_sgf_#1_pending_prop}
	\prop_gset_eq:Nc \g__pgfgo_captures_faded_prop {g__pgfgo_sgf_#1_faded_prop}
	\prop_gset_eq:Nc \g__pgfgo_captures_marks_prop {g__pgfgo_sgf_#1_marks_prop}
	\prop_gset_eq:Nc \g_pgfgo_points_prop {g__pgfgo_sgf_#1_points_prop}
	\prop_gset_eq:Nc \g__pgfgo_notes_number_prop {g__pgfgo_sgf_#1_notes_number_prop}
	\prop_gset_eq:Nc \g__pgfgo_notes_code_prop {g__pgfgo_sgf_#1_notes_code_prop}
	\pgfgo_kernel_board_restore:n {sgf-#1}
}
\cs_generate_variant:Nn \__pgfgo_sgf_restore:n {V}

%LA ULTIMA JUGADA QUE SE MUESTRA, Y SUS MARCAS.
\cs_new_protected:Npn \__pgfgo_sgf_last: {
	\__pgfgo_sgf_count_moves:Nn \l__pgfgo_sgf_last_int {\l__pgfgo_sgf_to_int}
	\int_set:Nn \l__pgfgo_sgf_last_int {\int_min:nn {\l__pgfgo_sgf_last_int} {\l__pgfgo_sgf_to_int}}
	\__pgfgo_sgf_marked:
}

%LAS PIEDRAS INICIALES Y LAS JUGADAS, DESDE EL PRINCIPIO O (CON \l__pgfgo_sgf_cache_bool) DESDE UNA COPIA.
%LAS MARCAS SE AVERIGUAN ANTES, PORQUE DECIDEN SI UNA COPIA SIRVE (NO DAN AVISOS).
\cs_new_protected:Npn \__pgfgo_sgf_play: {
	\int_zero:N \l__pgfgo_sgf_count_int
	\int_zero:N \l__pgfgo_sgf_number_int
	\int_zero:N \l__pgfgo_sgf_shift_int
	\tl_clear:N \l__pgfgo_sgf_slot_tl
	%SIN goban/captures LAS PIEDRAS SE DIBUJAN AL JUGARLAS: NO HAY NADA QUE GUARDAR. UN goban CON name TAMPOCO
	%USA LA COPIA: SU MEMORIA TIENE QUE TENER TODAS LAS JUGADAS, Y LA COPIA NO LAS TRAE.
	\bool_lazy_all:nTF
		{{\l__pgfgo_sgf_cache_bool} {\l_pgfgo_goban_captures_bool} {\tl_if_empty_p:N \l_pgfgo_goban_name_tl}}
	{
		\int_set:Nn \l__pgfgo_sgf_start_int {1}
		\int_set:Nn \l__pgfgo_sgf_resume_int {\seq_count:N \l_pgfgo_kernel_sgf_moves_seq + 1}
		\prop_clear:N \l__pgfgo_sgf_numbered_prop
		\bool_set_false:N \l__pgfgo_sgf_outside_bool
		\bool_gset_false:N \g__pgfgo_captures_warned_bool
		\__pgfgo_sgf_context:
		\__pgfgo_sgf_last:
		\__pgfgo_sgf_choose:
		\tl_if_empty:NTF \l__pgfgo_sgf_slot_tl {
			\__pgfgo_sgf_setup_stones:nN {black} \l_pgfgo_kernel_sgf_black_seq
			\__pgfgo_sgf_setup_stones:nN {white} \l_pgfgo_kernel_sgf_white_seq
		}{
			\__pgfgo_sgf_restore:V \l__pgfgo_sgf_slot_tl
		}
		\seq_map_indexed_inline:Nn \l_pgfgo_kernel_sgf_moves_seq {
			\int_compare:nNnF {##1} < {\l__pgfgo_sgf_start_int} {
				\int_set:Nn \l__pgfgo_sgf_index_int {##1}
				\__pgfgo_sgf_event:nnn ##2
			}
		}
		\__pgfgo_sgf_save:nn {b} {\l__pgfgo_sgf_resume_int}
	}{
		\bool_set_false:N \l__pgfgo_sgf_cache_bool
		\prop_clear:N \l__pgfgo_sgf_numbered_prop
		\__pgfgo_sgf_setup_stones:nN {black} \l_pgfgo_kernel_sgf_black_seq
		\__pgfgo_sgf_setup_stones:nN {white} \l_pgfgo_kernel_sgf_white_seq
		\__pgfgo_sgf_last:
		\seq_map_inline:Nn \l_pgfgo_kernel_sgf_moves_seq {\__pgfgo_sgf_event:nnn ##1}
	}
}

%\pgfgodefinesgf[game = <n>, charset = <codificacion>, syntax = <sintaxis>, origin = <esquina>,
%transpose]{<nombre>}{<archivo>}: <nombre> SIRVE DONDE VA UN ARCHIVO SGF (\sgf, \sgfinfo, sgf size, ...). EL
%KERNEL LO TRADUCE AL ARCHIVO; LAS OPCIONES QUEDAN EN \g__pgfgo_sgf_names_prop
%({game}{charset}{origin}{transpose}{syntax}; game, charset Y syntax VACIOS SI NO SE DIERON) Y CADA COMANDO
%LAS PONE ANTES DE SUS OPCIONES, QUE GANAN. UN NOMBRE QUE NO ESTA DEFINIDO ES UN ARCHIVO.
%origin: LA ESQUINA DONDE VA EL PUNTO aa DEL ARCHIVO. transpose: LA PRIMERA LETRA DE CADA PUNTO ES LA FILA
%Y NO LA COLUMNA. ENTRE LAS DOS, LAS OCHO SIMETRIAS DEL TABLERO. SOLO VALEN PARA EL NOMBRE: UN ARCHIVO SE
%LEE COMO DICE SGF (aa ARRIBA A LA IZQUIERDA, LA PRIMERA LETRA ES LA COLUMNA).
\prop_new:N \g__pgfgo_sgf_names_prop
\tl_new:N \l__pgfgo_sgf_name_game_tl
\tl_new:N \l__pgfgo_sgf_name_charset_tl
\tl_new:N \l__pgfgo_sgf_name_origin_tl
\tl_new:N \l__pgfgo_sgf_name_transpose_tl
\tl_new:N \l__pgfgo_sgf_name_syntax_tl
\tl_new:N \l__pgfgo_sgf_name_tl
\keys_define:nn {pgfgo / define~sgf} {
	game					.tl_set:N		= \l__pgfgo_sgf_name_game_tl,
	charset				.tl_set:N		= \l__pgfgo_sgf_name_charset_tl,
	syntax				.tl_set:N		= \l__pgfgo_sgf_name_syntax_tl,
	origin				.choices:nn	= {top~left, top~right, bottom~left, bottom~right}
		{\tl_set_eq:NN \l__pgfgo_sgf_name_origin_tl \l_keys_choice_tl},
	origin				.initial:n	= {top~left},
	transpose			.choices:nn	= {true, false}
		{\tl_set_eq:NN \l__pgfgo_sgf_name_transpose_tl \l_keys_choice_tl},
	transpose			.default:n	= {true},
	transpose			.initial:n	= {false},
}
%GUARDA LAS OPCIONES #1 DEL NOMBRE #2.
\cs_new_protected:Npn \__pgfgo_sgf_name:nn #1#2 {
	\keys_set:nn {pgfgo / define~sgf} {#1}
	\prop_gput:Nee \g__pgfgo_sgf_names_prop {\text_expand:n {#2}}
		{{\exp_not:V \l__pgfgo_sgf_name_game_tl} {\exp_not:V \l__pgfgo_sgf_name_charset_tl}
			{\exp_not:V \l__pgfgo_sgf_name_origin_tl} {\exp_not:V \l__pgfgo_sgf_name_transpose_tl}
			{\exp_not:V \l__pgfgo_sgf_name_syntax_tl}}
}
\NewDocumentCommand \pgfgodefinesgf {O{}mm} {
	\group_begin:
		\__pgfgo_sgf_name:nn {#1} {#2}
		\pgfgo_kernel_if_feature:nT {sgf} {\pgfgo_kernel_sgf_define:nn {#2} {#3}}
	\group_end:
}

%\begin{pgfgosgf}[<opciones>]{<nombre>} ... \end{pgfgosgf}: UN ARCHIVO ESCRITO EN EL DOCUMENTO (EN CUALQUIER
%SINTAXIS), QUE LOS COMANDOS DE SGF LEEN COMO EL ARCHIVO <nombre>. LAS OPCIONES SON LAS DE \pgfgodefinesgf.
%LAS LINEAS SE LEEN TAL CUAL (VER \pgfgo_kernel_sgf_text:nn): \begin{pgfgosgf}[<opciones>]{<nombre>} TERMINA SU
%LINEA. SIN UN KERNEL QUE LEA PARTIDAS, EL CONTENIDO SE SALTEA.
\pgfgo_kernel_if_feature:nTF {sgf} {
	\NewDocumentEnvironment {pgfgosgf} {O{}m} {
		\__pgfgo_sgf_name:nn {#1} {#2}
		\pgfgo_kernel_sgf_text:nn {#2}
			{\c_backslash_str end \c_left_brace_str pgfgosgf \c_right_brace_str}
		\ignorespaces
	} {\ignorespacesafterend}
} {
	\NewDocumentEnvironment {pgfgosgf} {O{}m +b} {\pgfgo_kernel_require:n {sgf}} {\ignorespacesafterend}
}

%SI #1 ES UN NOMBRE DE \pgfgodefinesgf, PONE SU game, SU charset, SU syntax Y SU ORIENTACION. SI NO, LA
%ORIENTACION DE SGF.
\cs_new_protected:Npn \pgfgo_sgf_use_name:n #1 {
	\tl_set:Nn \l_pgfgo_kernel_sgf_origin_tl {top~left}
	\tl_set:Nn \l_pgfgo_kernel_sgf_transpose_tl {false}
	\prop_get:NeNT \g__pgfgo_sgf_names_prop {\text_expand:n {#1}} \l__pgfgo_sgf_name_tl
		{\exp_after:wN \__pgfgo_sgf_use_name:nnnnn \l__pgfgo_sgf_name_tl}
}
\cs_new_protected:Npn \__pgfgo_sgf_use_name:nnnnn #1#2#3#4#5 {
	\tl_if_empty:nF {#1} {\int_set:Nn \l_pgfgo_kernel_sgf_game_int {#1}}
	\tl_if_empty:nF {#2} {\tl_set:Nn \l_pgfgo_kernel_sgf_charset_tl {#2}}
	\tl_set:Nn \l_pgfgo_kernel_sgf_origin_tl {#3}
	\tl_set:Nn \l_pgfgo_kernel_sgf_transpose_tl {#4}
	\tl_if_empty:nF {#5} {\tl_set:Nn \l_pgfgo_kernel_sgf_syntax_tl {#5}}
}
\cs_generate_variant:Nn \pgfgo_sgf_use_name:n {V}
\prg_generate_conditional_variant:Nnn \prop_get:NnN {NeN} {T}

%EJECUTA #2 CON EL game, EL charset, LA syntax Y LA ORIENTACION DEL NOMBRE #1, Y DESPUES VUELVE A LOS DE
%ANTES (PARA LAS CLAVES DE goban, QUE NO ESTAN EN UN GRUPO PROPIO).
\int_new:N \l__pgfgo_sgf_saved_game_int
\tl_new:N \l__pgfgo_sgf_saved_charset_tl
\tl_new:N \l__pgfgo_sgf_saved_origin_tl
\tl_new:N \l__pgfgo_sgf_saved_transpose_tl
\tl_new:N \l__pgfgo_sgf_saved_syntax_tl
\cs_new_protected:Npn \pgfgo_sgf_with_name:nn #1#2 {
	\int_set_eq:NN \l__pgfgo_sgf_saved_game_int \l_pgfgo_kernel_sgf_game_int
	\tl_set_eq:NN \l__pgfgo_sgf_saved_charset_tl \l_pgfgo_kernel_sgf_charset_tl
	\tl_set_eq:NN \l__pgfgo_sgf_saved_origin_tl \l_pgfgo_kernel_sgf_origin_tl
	\tl_set_eq:NN \l__pgfgo_sgf_saved_transpose_tl \l_pgfgo_kernel_sgf_transpose_tl
	\tl_set_eq:NN \l__pgfgo_sgf_saved_syntax_tl \l_pgfgo_kernel_sgf_syntax_tl
	\pgfgo_sgf_use_name:n {#1}
	#2
	\int_set_eq:NN \l_pgfgo_kernel_sgf_game_int \l__pgfgo_sgf_saved_game_int
	\tl_set_eq:NN \l_pgfgo_kernel_sgf_charset_tl \l__pgfgo_sgf_saved_charset_tl
	\tl_set_eq:NN \l_pgfgo_kernel_sgf_origin_tl \l__pgfgo_sgf_saved_origin_tl
	\tl_set_eq:NN \l_pgfgo_kernel_sgf_transpose_tl \l__pgfgo_sgf_saved_transpose_tl
	\tl_set_eq:NN \l_pgfgo_kernel_sgf_syntax_tl \l__pgfgo_sgf_saved_syntax_tl
}
\cs_generate_variant:Nn \pgfgo_sgf_with_name:nn {V}

\cs_new_protected:Npn \pgfgo_sgf:nn #1#2 {
	\group_begin:
		\pgfgo_sgf_use_name:n {#2}
		\keys_set:nn {pgfgo / sgf} {#1}
		\tl_set:Nn \l__pgfgo_sgf_file_tl {#2}
		\exp_args:NnV \pgfgo_kernel_sgf_read:nn {#2} \l__pgfgo_sgf_variation_tl
		\__pgfgo_sgf_numbering:
		\bool_if:NT \l__pgfgo_sgf_check_size_bool {\__pgfgo_sgf_check_size:n {#2}}
		\__pgfgo_sgf_play:
		%LAS MARCAS, LAS FLECHAS Y LAS VARIANTES DE LA ULTIMA JUGADA.
		\seq_map_inline:Nn \l__pgfgo_sgf_marks_seq {\__pgfgo_sgf_mark:nnnnn ##1}
		\bool_if:NT \l__pgfgo_sgf_marks_bool {
			\pgfgo_kernel_sgf_lines:n {\l__pgfgo_sgf_last_int}
			\seq_map_inline:Nn \l_pgfgo_kernel_sgf_lines_seq {\__pgfgo_sgf_line:nnnnn ##1}
		}
		\seq_map_inline:Nn \l__pgfgo_sgf_variations_seq {\__pgfgo_sgf_variation:nnnn ##1}
		\__pgfgo_sgf_last_mark:
	\group_end:
}

%CON last~mark: LA MARCA DE LA ULTIMA JUGADA QUE SE MUESTRA (NO SI ES UN PASE, SI TIENE NUMERO NI SI EL
%ARCHIVO MARCA ESE PUNTO).
\cs_new_protected:Npn \__pgfgo_sgf_last_mark: {
	\bool_lazy_and:nnT
		{! \tl_if_empty_p:N \l__pgfgo_sgf_last_mark_tl}
		{\int_compare_p:nNn {\l__pgfgo_sgf_last_int} > {0}}
		{
			\int_zero:N \l_tmpa_int
			\seq_map_inline:Nn \l_pgfgo_kernel_sgf_moves_seq {
				\__pgfgo_sgf_if_move:nnnT ##1 {
					\int_incr:N \l_tmpa_int
					\int_compare:nNnT {\l_tmpa_int} = {\l__pgfgo_sgf_last_int} {
						\__pgfgo_sgf_last_mark:nnn ##1
						\seq_map_break:
					}
				}
			}
		}
}
\cs_new_protected:Npn \__pgfgo_sgf_last_mark:nnn #1#2#3 {
	\tl_if_blank:nF {#2} {
		\__pgfgo_sgf_if_file_marked:nnF {#2} {#3} {
			\prop_if_in:NVF \l__pgfgo_sgf_numbered_prop \l__pgfgo_captures_key_tl {
				\use:e {
					\exp_not:N \__pgfgo_sgf_mark_put:nn
						{#1, \exp_not:V \l__pgfgo_sgf_last_mark_tl} {\exp_not:n {{#2}{#3}}}
				}
			}
		}
	}
}

%\sgf SOLO EXISTE DENTRO DE goban (VER pgf-go-goban.sty).
\NewDocumentCommand{\__pgfgo_sgf_command}{O{}m}{
	\__pgfgo_sgf_if_kernel:n {\pgfgo_sgf:nn {#1} {#2}}
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%--------------------------------COMENTARIOS Y ANOTACIONES--------------------------------------%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%EL COMENTARIO DE UNA JUGADA ES SU NOMBRE (N, EN NEGRITA), SUS ANOTACIONES (TE, BM, DO, IT, GB, GW, DM,
%UC, CON LOS TEXTOS DE /pgfgo/sgf annotations) Y SU COMENTARIO (C).
\bool_new:N \l__pgfgo_sgf_annotations_bool
\bool_set_true:N \l__pgfgo_sgf_annotations_bool
%CADA COMANDO TIENE SU PROPIA OPCION annotations, QUE COPIA EN LA DE ARRIBA AL EMPEZAR.
\bool_new:N \l__pgfgo_sgfcomment_annotations_bool
\bool_set_true:N \l__pgfgo_sgfcomment_annotations_bool
\bool_new:N \l__pgfgo_sgfanim_annotations_bool
\bool_set_true:N \l__pgfgo_sgfanim_annotations_bool
\bool_new:N \l__pgfgo_sgfdiag_annotations_bool
\bool_set_true:N \l__pgfgo_sgfdiag_annotations_bool
\bool_new:N \l__pgfgo_sgfprob_annotations_bool
\bool_set_true:N \l__pgfgo_sgfprob_annotations_bool
%CON chat = false, LOS COMENTARIOS PIERDEN EL CHAT DE KGS Y OGS (IGUAL: UNA OPCION POR COMANDO).
\bool_new:N \l__pgfgo_sgf_chat_bool
\bool_set_true:N \l__pgfgo_sgf_chat_bool
\bool_new:N \l__pgfgo_sgfcomment_chat_bool
\bool_set_true:N \l__pgfgo_sgfcomment_chat_bool
\bool_new:N \l__pgfgo_sgfanim_chat_bool
\bool_set_true:N \l__pgfgo_sgfanim_chat_bool
\bool_new:N \l__pgfgo_sgfdiag_chat_bool
\bool_set_true:N \l__pgfgo_sgfdiag_chat_bool
\bool_new:N \l__pgfgo_sgfprob_chat_bool
\bool_set_true:N \l__pgfgo_sgfprob_chat_bool
%EL COMENTARIO LEIDO: SUS ANOTACIONES COMO TEXTOS, SI TIENE ANOTACIONES Y EL TEXTO DE C.
\seq_new:N \l__pgfgo_sgf_note_seq
\bool_new:N \l__pgfgo_sgf_annotated_bool
\tl_new:N \l__pgfgo_sgf_comment_tl

\keys_define:nn {pgfgo / sgf~annotations} {
	tesuji								.tl_set:N		= \l__pgfgo_sgf_note_TE_i_tl,
	tesuji								.initial:n	= {\pgfgo_text:n {tesuji}},
	very~good~tesuji			.tl_set:N		= \l__pgfgo_sgf_note_TE_ii_tl,
	very~good~tesuji			.initial:n	= {\pgfgo_text:n {very~good~tesuji}},
	bad~move							.tl_set:N		= \l__pgfgo_sgf_note_BM_i_tl,
	bad~move							.initial:n	= {\pgfgo_text:n {bad~move}},
	very~bad~move					.tl_set:N		= \l__pgfgo_sgf_note_BM_ii_tl,
	very~bad~move					.initial:n	= {\pgfgo_text:n {very~bad~move}},
	doubtful							.tl_set:N		= \l__pgfgo_sgf_note_DO_i_tl,
	doubtful							.initial:n	= {\pgfgo_text:n {doubtful}},
	interesting						.tl_set:N		= \l__pgfgo_sgf_note_IT_i_tl,
	interesting						.initial:n	= {\pgfgo_text:n {interesting}},
	good~for~black				.tl_set:N		= \l__pgfgo_sgf_note_GB_i_tl,
	good~for~black				.initial:n	= {\pgfgo_text:n {good~for~black}},
	very~good~for~black		.tl_set:N		= \l__pgfgo_sgf_note_GB_ii_tl,
	very~good~for~black		.initial:n	= {\pgfgo_text:n {very~good~for~black}},
	good~for~white				.tl_set:N		= \l__pgfgo_sgf_note_GW_i_tl,
	good~for~white				.initial:n	= {\pgfgo_text:n {good~for~white}},
	very~good~for~white		.tl_set:N		= \l__pgfgo_sgf_note_GW_ii_tl,
	very~good~for~white		.initial:n	= {\pgfgo_text:n {very~good~for~white}},
	even									.tl_set:N		= \l__pgfgo_sgf_note_DM_i_tl,
	even									.initial:n	= {\pgfgo_text:n {even}},
	unclear								.tl_set:N		= \l__pgfgo_sgf_note_UC_i_tl,
	unclear								.initial:n	= {\pgfgo_text:n {unclear}},
}
%DM Y UC ENFATIZADOS USAN EL MISMO TEXTO; DO E IT NO TIENEN VALOR.
\clist_map_inline:nn {DM, UC, DO, IT} {
	\tl_new:c {l__pgfgo_sgf_note_ #1 _ii_tl}
	\tl_set:ce {l__pgfgo_sgf_note_ #1 _ii_tl} {\exp_not:c {l__pgfgo_sgf_note_ #1 _i_tl}}
}

\keys_define:nn {pgfgo} {
	sgf~annotations				.code:n			= {\keys_set:nn {pgfgo / sgf~annotations} {#1}},
}

\cs_new_protected:Npn \__pgfgo_sgf_note:nn #1#2 {
	\str_if_eq:nnTF {#1} {N}
		{\seq_put_right:Nn \l__pgfgo_sgf_note_seq {\textbf{\pgfgo_kernel_sgf_name:n {#2}}}}
		{
			\cs_if_exist:cT {l__pgfgo_sgf_note_ #1 _ \int_to_roman:n {#2} _tl}
				{\seq_put_right:Nv \l__pgfgo_sgf_note_seq {l__pgfgo_sgf_note_ #1 _ \int_to_roman:n {#2} _tl}}
		}
}

%LEE EL COMENTARIO DE LA JUGADA #1 DE LA ULTIMA PARTIDA LEIDA (0: EL DE ANTES DE LA PRIMERA JUGADA), PARA
%PREGUNTAR SI TIENE (\__pgfgo_sgf_if_comment:nT) Y ESCRIBIRLO (\__pgfgo_sgf_comment_use:) SIN VOLVER A PEDIRLO.
\cs_new_protected:Npn \__pgfgo_sgf_comment_get:n #1 {
	\seq_clear:N \l__pgfgo_sgf_note_seq
	\bool_set_false:N \l__pgfgo_sgf_annotated_bool
	\bool_if:NT \l__pgfgo_sgf_annotations_bool {
		\pgfgo_kernel_sgf_annotations:n {#1}
		\seq_if_empty:NF \l_pgfgo_kernel_sgf_annotations_seq {
			\bool_set_true:N \l__pgfgo_sgf_annotated_bool
			\seq_map_inline:Nn \l_pgfgo_kernel_sgf_annotations_seq {\__pgfgo_sgf_note:nn ##1}
		}
	}
	\tl_set:Ne \l__pgfgo_sgf_comment_tl
		{\pgfgo_kernel_sgf_comment:nn {#1} {\bool_if:NTF \l__pgfgo_sgf_chat_bool {true} {false}}}
}
%UN TEXTO DEL ARCHIVO (COMENTARIO, PROPIEDAD): SE ESCRIBE, CON EL AVISO sgf-glyphs SI A LA FUENTE LE FALTAN
%CARACTERES CJK (LaTeX SOLO LO ANOTA EN EL .log). CON luatexja, ctex, luatexko O xeCJK NO SE MIRA: ESCRIBEN ESOS
%CARACTERES CON OTRA FUENTE, QUE NO ES LA ACTUAL.
\msg_new:nnn {pgfgo} {sgf-glyphs}
	{The~font~'#1'~has~no~glyph~for~#2~(and~maybe~other~CJK~characters)~of~an~SGF~text.~Load~a~font~with~them,~for~example~with~ctex,~luatexja~or~luatexko.}
\cs_new_protected:Npn \__pgfgo_sgf_text:n #1 {
	\bool_lazy_any:nF {
		{\cs_if_exist_p:N \ltjsetparameter}
		{\cs_if_exist_p:N \ctexset}
		{\cs_if_exist_p:N \hangulfontspec}
		{\cs_if_exist_p:N \setCJKmainfont}
	}{
		\pgfgo_kernel_sgf_glyphs:n {#1}
	}
	#1
}
\cs_generate_variant:Nn \__pgfgo_sgf_text:n {V}

\cs_new_protected:Npn \__pgfgo_sgf_comment_use: {
	\seq_if_empty:NF \l__pgfgo_sgf_note_seq {
		\seq_use:Nn \l__pgfgo_sgf_note_seq {.~}.
		\tl_if_blank:VF \l__pgfgo_sgf_comment_tl {~}
	}
	\__pgfgo_sgf_text:V \l__pgfgo_sgf_comment_tl
}

%ESCRIBE EL COMENTARIO DE LA JUGADA #1 DE LA ULTIMA PARTIDA LEIDA.
\cs_new_protected:Npn \pgfgo_sgf_comment:n #1 {
	\__pgfgo_sgf_comment_get:n {#1}
	\__pgfgo_sgf_comment_use:
}

%VERDADERO SI LA JUGADA #1 TIENE COMENTARIO O ANOTACIONES. DEJA EL COMENTARIO LISTO PARA
%\__pgfgo_sgf_comment_use:.
\prg_new_protected_conditional:Npnn \__pgfgo_sgf_if_comment:n #1 {T} {
	\__pgfgo_sgf_comment_get:n {#1}
	\bool_lazy_or:nnTF
		{\l__pgfgo_sgf_annotated_bool}
		{! \tl_if_blank_p:V \l__pgfgo_sgf_comment_tl}
		{\prg_return_true:} {\prg_return_false:}
}

%\sgfcomment[<opciones>]{<archivo>}{<jugada>} ESCRIBE EL COMENTARIO DE UNA JUGADA.
\tl_new:N \l__pgfgo_sgfcomment_variation_tl
\keys_define:nn {pgfgo / sgf~comment} {
	game						.code:n			= {\int_set:Nn \l_pgfgo_kernel_sgf_game_int {#1}},
	variation				.tl_set:N		= \l__pgfgo_sgfcomment_variation_tl,
	annotations			.bool_set:N	= \l__pgfgo_sgfcomment_annotations_bool,
	annotations			.default:n	= {true},
	chat						.bool_set:N	= \l__pgfgo_sgfcomment_chat_bool,
	chat						.default:n	= {true},
}
\NewDocumentCommand \sgfcomment {O{}mm} {
	\__pgfgo_sgf_if_kernel:n {
		\group_begin:
			\pgfgo_sgf_use_name:n {#2}
			\keys_set:nn {pgfgo / sgf~comment} {#1}
			\bool_set_eq:NN \l__pgfgo_sgf_annotations_bool \l__pgfgo_sgfcomment_annotations_bool
			\bool_set_eq:NN \l__pgfgo_sgf_chat_bool \l__pgfgo_sgfcomment_chat_bool
			\exp_args:NnV \pgfgo_kernel_sgf_read:nn {#2} \l__pgfgo_sgfcomment_variation_tl
			\pgfgo_sgf_comment:n {#3}
		\group_end:
	}
}

%\sgfinfo{<archivo>}{<propiedad>} ESCRIBE UNA PROPIEDAD DE LA RAIZ (PB, PW, RE, KM, DT, ...) O, CON move,
%DE UNA JUGADA (BL Y WL: EL TIEMPO QUE LE QUEDA A CADA JUGADOR) DE LA LINEA variation.
\int_new:N \l__pgfgo_sgfinfo_move_int
\tl_new:N \l__pgfgo_sgfinfo_variation_tl
\keys_define:nn {pgfgo / sgf~info} {
	game					.code:n			= {\int_set:Nn \l_pgfgo_kernel_sgf_game_int {#1}},
	move					.int_set:N	= \l__pgfgo_sgfinfo_move_int,
	variation			.tl_set:N		= \l__pgfgo_sgfinfo_variation_tl,
}
\NewDocumentCommand \sgfinfo {O{}mm} {
	\__pgfgo_sgf_if_kernel:n {
		\group_begin:
			\pgfgo_sgf_use_name:n {#2}
			\keys_set:nn {pgfgo / sgf~info} {#1}
			\bool_lazy_and:nnTF
				{\int_compare_p:nNn {\l__pgfgo_sgfinfo_move_int} = {0}}
				{\tl_if_empty_p:N \l__pgfgo_sgfinfo_variation_tl}
				{\tl_set:Ne \l_tmpa_tl {\pgfgo_kernel_sgf_info:nn {#2} {#3}}}
				{
					\tl_set:Ne \l_tmpa_tl {
						\pgfgo_kernel_sgf_move_info:nnnn {#2} {\l__pgfgo_sgfinfo_variation_tl}
							{\l__pgfgo_sgfinfo_move_int} {#3}
					}
				}
			\__pgfgo_sgf_text:V \l_tmpa_tl
		\group_end:
	}
}

\keys_define:nn {pgfgo} {
	sgf~comment			.code:n			= {\keys_set:nn {pgfgo / sgf~comment} {#1}},
	sgf~info				.code:n			= {\keys_set:nn {pgfgo / sgf~info} {#1}},
}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%---------------------------------------ANIMACION-----------------------------------------------%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%\sgfanimation[<opciones>]{<archivo>} RECORRE LA PARTIDA CON EL PAQUETE animate: UN goban POR CUADRO.
%EL CUADRO k MUESTRA LA POSICION DESPUES DE LA JUGADA k (EL 0, LA DE ANTES DE LA PRIMERA JUGADA).
%SE USA FUERA DE goban. NECESITA kernel = lua Y \usepackage{animate}.

\int_new:N \l__pgfgo_sgfanim_from_int
\int_new:N \l__pgfgo_sgfanim_to_int
\tl_new:N \l__pgfgo_sgfanim_fps_tl
\tl_new:N \l__pgfgo_sgfanim_goban_tl
\tl_new:N \l__pgfgo_sgfanim_animate_tl
\tl_new:N \l__pgfgo_sgfanim_last_tl
\bool_new:N \l__pgfgo_sgfanim_numbers_bool
\bool_new:N \l__pgfgo_sgfanim_comments_bool
\dim_new:N \l__pgfgo_sgfanim_comment_height_dim
\tl_new:N \l__pgfgo_sgfanim_comment_font_tl
\tl_new:N \l__pgfgo_sgfanim_variation_tl
\bool_new:N \l__pgfgo_sgfanim_marks_bool
\bool_new:N \l__pgfgo_sgfanim_view_bool
\bool_new:N \l__pgfgo_sgfanim_partial_bool
\tl_new:N \l__pgfgo_sgfanim_partial_tl
\bool_new:N \l__pgfgo_sgfanim_layers_bool
\tl_new:N \l__pgfgo_sgfanim_file_tl
\tl_new:N \l__pgfgo_sgfanim_board_tl
%LAS JUGADAS (SIN LOS CAMBIOS DE NODOS NI LOS NUMEROS), {black | white}{x}{y}: LA JUGADA DE CADA CUADRO.
\seq_new:N \l__pgfgo_sgfanim_moves_seq
\box_new:N \l__pgfgo_sgfanim_box

\keys_define:nn {pgfgo / sgf~animation} {
	from						.int_set:N	= \l__pgfgo_sgfanim_from_int,
	from						.initial:n	= {0},
	%last (-1): LA ULTIMA JUGADA.
	to							.code:n			= {\__pgfgo_sgf_set_to:Nnn \l__pgfgo_sgfanim_to_int {-1} {#1}},
	to							.initial:n	= {last},
	fps							.tl_set:N		= \l__pgfgo_sgfanim_fps_tl,
	fps							.initial:n	= {1},
	goban						.tl_set:N		= \l__pgfgo_sgfanim_goban_tl,
	animate					.tl_set:N		= \l__pgfgo_sgfanim_animate_tl,
	animate					.initial:n	= {controls},
	numbers					.bool_set:N	= \l__pgfgo_sgfanim_numbers_bool,
	numbers					.default:n	= {true},
	%OPCIONES DE LA MARCA DE LA ULTIMA JUGADA (SIN numbers). false: SIN MARCA.
	last~mark				.code:n			= {
															\str_if_eq:nnTF {#1} {false}
																{\tl_clear:N \l__pgfgo_sgfanim_last_tl}
																{\tl_set:Nn \l__pgfgo_sgfanim_last_tl {#1}}
														},
	last~mark				.initial:n	= {circle},
	comments				.code:n			= {\keys_set:nn {pgfgo / sgf~animation / comments} {#1}},
	comments				.default:n	= {true},
	%COMO EN \sgf.
	variation				.tl_set:N		= \l__pgfgo_sgfanim_variation_tl,
	marks						.bool_set:N	= \l__pgfgo_sgfanim_marks_bool,
	marks						.default:n	= {true},
	marks						.initial:n	= {true},
	%LAS ANOTACIONES (TE, BM, GB, ...) Y EL NOMBRE DEL NODO, CON EL COMENTARIO.
	annotations			.bool_set:N	= \l__pgfgo_sgfanim_annotations_bool,
	annotations			.default:n	= {true},
	chat						.bool_set:N	= \l__pgfgo_sgfanim_chat_bool,
	chat						.default:n	= {true},
	game						.code:n			= {\int_set:Nn \l_pgfgo_kernel_sgf_game_int {#1}},
	%SI EL ARCHIVO TIENE VISTA (VW), LOS TABLEROS MUESTRAN SOLO ESA PARTE.
	view						.bool_set:N	= \l__pgfgo_sgfanim_view_bool,
	view						.default:n	= {true},
	view						.initial:n	= {true},
	%auto: LOS TABLEROS MUESTRAN SOLO LA PARTE QUE USA LA PARTIDA (SI NO HAY VISTA).
	partial					.code:n			= {\__pgfgo_sgf_partial:NNn \l__pgfgo_sgfanim_partial_bool \l__pgfgo_sgfanim_partial_tl {#1}},
	partial					.initial:n	= {false},
	%POR CAPAS: CADA PIEDRA SE DIBUJA UNA SOLA VEZ (VER MAS ABAJO).
	layers					.bool_set:N	= \l__pgfgo_sgfanim_layers_bool,
	layers					.default:n	= {true},
	layers					.initial:n	= {true},
}

%COMO EN \sgf.
\__pgfgo_sgf_numbering_keys:nnn {pgfgo / sgf~animation} {sgfanim} {100}

%LOS COMENTARIOS DE CADA CUADRO, DEBAJO DEL TABLERO, EN UNA CAJA DE ALTO height.
\keys_define:nn {pgfgo / sgf~animation / comments} {
	true						.code:n			= {\bool_set_true:N \l__pgfgo_sgfanim_comments_bool},
	false						.code:n			= {\bool_set_false:N \l__pgfgo_sgfanim_comments_bool},
	height					.dim_set:N	= \l__pgfgo_sgfanim_comment_height_dim,
	height					.initial:n	= {4em},
	font						.tl_set:N		= \l__pgfgo_sgfanim_comment_font_tl,
	font						.initial:n	= {\small},
}

\keys_define:nn {pgfgo} {
	sgf~animation		.code:n			= {\keys_set:nn {pgfgo / sgf~animation} {#1}}
}

\msg_new:nnn {pgfgo} {sgf-animation-animate}
	{\iow_char:N\\sgfanimation~needs~the~animate~package.~Add~\iow_char:N\\usepackage{animate}.}


\cs_new_protected:Npn \__pgfgo_sgfanim_keep_move:nnn #1#2#3 {
	\__pgfgo_sgf_if_move:nnnT {#1} {#2} {#3}
		{\seq_put_right:Nn \l__pgfgo_sgfanim_moves_seq {{#1}{#2}{#3}}}
}

%LEE LA PARTIDA Y FIJA LOS CUADROS. SEPARADO DE \pgfgo_sgfanimation:nn PARA PODER DIBUJAR CUADROS SUELTOS.
\cs_new_protected:Npn \pgfgo_sgfanimation_setup:nn #1#2 {
	\pgfgo_sgf_use_name:n {#2}
	\keys_set:nn {pgfgo / sgf~animation} {#1}
	\bool_set_eq:NN \l__pgfgo_sgf_annotations_bool \l__pgfgo_sgfanim_annotations_bool
	\bool_set_eq:NN \l__pgfgo_sgf_chat_bool \l__pgfgo_sgfanim_chat_bool
	%CADA CUADRO SIGUE LA PARTIDA DESDE EL ANTERIOR (VER \__pgfgo_sgf_play:).
	\__pgfgo_sgf_cache_begin:
	\tl_set:Nn \l__pgfgo_sgfanim_file_tl {#2}
	\tl_clear:N \l__pgfgo_sgf_extent_tl
	\bool_if:NT \l__pgfgo_sgfanim_partial_bool {\__pgfgo_sgf_extent:nV {#2} \l__pgfgo_sgfanim_variation_tl}
	\exp_args:NnV \pgfgo_kernel_sgf_read:nn {#2} \l__pgfgo_sgfanim_variation_tl
	%LOS TABLEROS TIENEN EL TAMANO DE LA PARTIDA (goban = {...} PUEDE CAMBIARLO).
	\__pgfgo_sgf_board:N \l__pgfgo_sgfanim_board_tl
	%UN CUADRO POR JUGADA.
	\seq_clear:N \l__pgfgo_sgfanim_moves_seq
	\seq_map_inline:Nn \l_pgfgo_kernel_sgf_moves_seq {\__pgfgo_sgfanim_keep_move:nnn ##1}
	\int_set:Nn \l__pgfgo_sgfanim_to_int {
		\int_compare:nNnTF {\l__pgfgo_sgfanim_to_int} < {0}
			{\seq_count:N \l__pgfgo_sgfanim_moves_seq}
			{\int_min:nn {\l__pgfgo_sgfanim_to_int} {\seq_count:N \l__pgfgo_sgfanim_moves_seq}}
	}
	\int_set:Nn \l__pgfgo_sgfanim_from_int
		{\int_max:nn {0} {\int_min:nn {\l__pgfgo_sgfanim_from_int} {\l__pgfgo_sgfanim_to_int}}}
	%TODOS LOS CUADROS TIENEN EL MISMO TABLERO: SI LA VISTA (VW) CAMBIA, EL QUE ABARCA TODAS.
	\int_set_eq:NN \l_pgfgo_goban_sgf_view_from_int \l__pgfgo_sgfanim_from_int
	\int_set_eq:NN \l_pgfgo_goban_sgf_view_to_int \l__pgfgo_sgfanim_to_int
	\tl_set_eq:NN \l_pgfgo_goban_sgf_view_variation_tl \l__pgfgo_sgfanim_variation_tl
}

%MARCA LA JUGADA #2,#3 DE #1. UN PASE NO SE MARCA, NI UN PUNTO QUE YA MARCA EL ARCHIVO.
\cs_new_protected:Npn \__pgfgo_sgfanim_mark:nnn #1#2#3 {
	\tl_if_blank:nF {#2} {
		\bool_if:NTF \l__pgfgo_sgfanim_marks_bool
			{\__pgfgo_sgf_if_file_marked:nnF {#2} {#3} {\__pgfgo_sgfanim_mark_put:nnn {#1} {#2} {#3}}}
			{\__pgfgo_sgfanim_mark_put:nnn {#1} {#2} {#3}}
	}
}
\cs_new_protected:Npn \__pgfgo_sgfanim_mark_put:nnn #1#2#3 {
	\use:e {
		\exp_not:N \pgfgo_marks_parsed:nn
			{#1, \exp_not:V \l__pgfgo_sgfanim_last_tl} {\exp_not:n {{#2}{#3}}}
	}
}

%ARMA UN CUADRO (O UNA LAMINA): EL goban CON #1 ADENTRO Y, CON comments, EL COMENTARIO #2 DEBAJO.
\cs_new_protected:Npn \__pgfgo_sgfanim_wrap:nn #1#2 {
	\hbox_set:Nn \l__pgfgo_sgfanim_box {
		\use:e {
			\exp_not:N \begin{goban}
				[
					\l__pgfgo_sgfanim_board_tl,
					\tl_if_empty:NTF \l__pgfgo_sgfanim_partial_tl {
						\bool_if:NT \l__pgfgo_sgfanim_partial_bool {partial = auto,}
						\bool_if:NT \l__pgfgo_sgfanim_view_bool {sgf~view = {\exp_not:V \l__pgfgo_sgfanim_file_tl},}
					}{
						partial = {\exp_not:V \l__pgfgo_sgfanim_partial_tl},
					}
					\exp_not:V \l__pgfgo_sgfanim_goban_tl
				]
		}
			\__pgfgo_sgf_extent_add:
			#1
		\end{goban}
	}
	\bool_if:NTF \l__pgfgo_sgfanim_comments_bool {
		\vbox:n {
			\box_use:N \l__pgfgo_sgfanim_box
			\skip_vertical:n {0.5em}
			\hbox:n {
				%EL \strut DA LA MISMA ALTURA A LA PRIMERA LINEA, HAYA COMENTARIO O NO: TODOS LOS CUADROS
				%MIDEN LO MISMO (SI NO, animate LOS ESTIRA PARA QUE ENTREN EN LA ANIMACION).
				\parbox[t][\l__pgfgo_sgfanim_comment_height_dim][t]{\box_wd:N \l__pgfgo_sgfanim_box}
					{\raggedright \l__pgfgo_sgfanim_comment_font_tl \strut #2}
			}
		}
	}{
		\box_use:N \l__pgfgo_sgfanim_box
	}
}

%LA PARTIDA HASTA LA JUGADA #1, CON LA MARCA DE LA ULTIMA JUGADA.
\cs_new_protected:Npn \__pgfgo_sgfanim_game:n #1 {
	\bool_set:Nn \l__pgfgo_sgf_check_size_bool
		{\int_compare_p:nNn {#1} = {\l__pgfgo_sgfanim_from_int}}
	\use:e {
		\exp_not:N \pgfgo_sgf:nn
			{
				to = \int_eval:n {#1},
				from = \bool_if:NTF \l__pgfgo_sgfanim_numbers_bool {1} {\int_eval:n {#1 + 1}},
				variation = {\exp_not:V \l__pgfgo_sgfanim_variation_tl},
				marks = \bool_if:NTF \l__pgfgo_sgfanim_marks_bool {true} {false},
				step = {\exp_not:V \l__pgfgo_sgfanim_step_clist},
				restart = {
					from = \int_use:N \l__pgfgo_sgfanim_restart_from_int,
					\exp_not:V \l__pgfgo_sgfanim_restart_tl
				},
				numbers = true,
				last~mark = false
			}
			{\exp_not:V \l__pgfgo_sgfanim_file_tl}
	}
	\bool_if:nT {
		! \l__pgfgo_sgfanim_numbers_bool &&
		! \tl_if_empty_p:N \l__pgfgo_sgfanim_last_tl &&
		\int_compare_p:nNn {#1} > {0}
	}{
		\use:e {
			\exp_not:N \__pgfgo_sgfanim_mark:nnn
				\seq_item:Nn \l__pgfgo_sgfanim_moves_seq {#1}
		}
	}
}

%DIBUJA EL CUADRO #1: LA POSICION DESPUES DE LA JUGADA #1.
\cs_new_protected:Npn \pgfgo_sgfanimation_frame:n #1 {
	\group_begin:
	\mode_leave_vertical:
	\__pgfgo_sgfanim_wrap:nn {\__pgfgo_sgfanim_game:n {#1}} {\pgfgo_sgf_comment:n {#1}}
	\group_end:
}


%POR CAPAS (layers): CADA PIEDRA SE DIBUJA UNA SOLA VEZ, EN UNA LAMINA QUE animate MUESTRA (CON UN
%timeline) DESDE EL CUADRO EN QUE APARECE HASTA EL ULTIMO EN QUE SIGUE IGUAL. EL PDF CRECE CON LA CANTIDAD
%DE JUGADAS, Y NO CON SU CUADRADO. LAS LAMINAS SE NUMERAN EN EL ORDEN EN QUE SE ARMAN: LA 0 ES EL
%TABLERO; DESPUES, POR CADA CUADRO, LO QUE SOLO ESTA EN ESE CUADRO (MARCAS Y COMENTARIO) Y LAS PIEDRAS
%QUE APARECEN EN EL. TODAS TIENEN EL TAMANO DEL TABLERO.
\int_new:N \g__pgfgo_sgfanim_layer_int
\int_new:N \g__pgfgo_sgfanim_file_int
\tl_new:N \l__pgfgo_sgfanim_old_tl
%LAS PIEDRAS ("x,y" -> CODIGO) DEL CUADRO ANTERIOR Y DEL ACTUAL.
\prop_new:N \l__pgfgo_sgfanim_prev_prop
\prop_new:N \l__pgfgo_sgfanim_cur_prop
%LA FIRMA DE LO QUE SE DIBUJA EN CADA PUNTO ({codigo}{atenuada}{marcas}) Y EL CUADRO AL QUE PERTENECE
%("ANIMACION.CUADRO"), EN EL CUADRO ANTERIOR (old) Y EN EL ACTUAL (new): \l__pgfgo_sgfanim_old_sig_x,y_tl, ETC.
\int_new:N \g__pgfgo_sgfanim_run_int
\tl_new:N \l__pgfgo_sgfanim_stamp_tl
\tl_new:N \l__pgfgo_sgfanim_last_stamp_tl
\cs_new_protected:Npn \__pgfgo_sgfanim_point_vars:n #1 {
	\tl_if_exist:cF {l__pgfgo_sgfanim_old_sig_ #1 _tl} {
		\tl_new:c {l__pgfgo_sgfanim_old_sig_ #1 _tl}
		\tl_new:c {l__pgfgo_sgfanim_old_stamp_ #1 _tl}
		\tl_new:c {l__pgfgo_sgfanim_new_sig_ #1 _tl}
		\tl_new:c {l__pgfgo_sgfanim_new_stamp_ #1 _tl}
	}
}
%"x,y" -> LAMINA DE LA PIEDRA QUE SE VE AHORA, Y LAMINA -> CUADRO EN QUE APARECIO.
\prop_new:N \l__pgfgo_sgfanim_active_prop
\prop_new:N \l__pgfgo_sgfanim_start_prop
%"x,y" -> LAMINA DE LAS PIEDRAS QUE APARECEN EN EL CUADRO QUE SE ARMA.
\prop_new:N \g__pgfgo_sgfanim_new_prop
%{LAMINA}{CUADRO EN QUE APARECE}{CANTIDAD DE CUADROS} DE CADA PIEDRA, Y CUADRO -> LAMINA DEL CUADRO.
\seq_new:N \l__pgfgo_sgfanim_stones_seq
\prop_new:N \l__pgfgo_sgfanim_own_prop
\iow_new:N \g__pgfgo_sgfanim_iow
\tl_new:N \l__pgfgo_sgfanim_timeline_tl

%LAS CAPAS DE PGF DE LAS LAMINAS: EL TABLERO, Y TODO LO DEMAS.
\clist_const:Nn \c__pgfgo_sgfanim_board_layers_clist
	{pgfgo_layer_goban_border, pgfgo_layer_goban_grid, pgfgo_layer_goban_labels}
\clist_const:Nn \c__pgfgo_sgfanim_top_layers_clist
	{pgfgo_layer_territory, pgfgo_layer_mark_shadow, pgfgo_layer_stone, pgfgo_layer_stone_mark, pgfgo_layer_mark, main}

%GUARDA LA LAMINA SIGUIENTE (#1: goban, #2: COMENTARIO).
\cs_new_protected:Npn \__pgfgo_sgfanim_layer:nn #1#2 {
	\box_if_exist:cF {g__pgfgo_sgfanim_ \int_use:N \g__pgfgo_sgfanim_layer_int _box}
		{\box_new:c {g__pgfgo_sgfanim_ \int_use:N \g__pgfgo_sgfanim_layer_int _box}}
	\hbox_gset:cn {g__pgfgo_sgfanim_ \int_use:N \g__pgfgo_sgfanim_layer_int _box}
		{\__pgfgo_sgfanim_wrap:nn {#1} {#2}}
	\int_gincr:N \g__pgfgo_sgfanim_layer_int
}

%SIN goban/captures, LAS PIEDRAS SE GUARDAN IGUAL (PARA DIBUJARLAS EN SUS LAMINAS), PERO NO SE QUITA NINGUNA.
\cs_new_protected:Npn \__pgfgo_sgfanim_collect: {
	\bool_if:NF \l_pgfgo_goban_captures_bool {
		\bool_set_true:N \l_pgfgo_goban_captures_bool
		\bool_set_true:N \l_pgfgo_captures_collect_bool
		\pgfgo_captures_begin:
	}
}

%UNA PIEDRA QUE APARECE EN EL PUNTO #1 CON LA FIRMA #2: SU LAMINA.
\cs_new_protected:Npn \__pgfgo_sgfanim_new_stone:nn #1#2 {
	\prop_gput:Nne \g__pgfgo_sgfanim_new_prop {#1} {\int_use:N \g__pgfgo_sgfanim_layer_int}
	\__pgfgo_sgfanim_layer:nn {
		\__pgfgo_sgfanim_collect:
		\__pgfgo_sgfanim_put:nnnn {#1} #2
	} {}
}
\cs_new_protected:Npn \__pgfgo_sgfanim_put:nnnn #1#2#3#4 {
	\prop_gput:Nnn \g__pgfgo_captures_pending_prop {#1} {#2}
	\int_compare:nNnT {#3} = {1} {\prop_gput:Nnn \g__pgfgo_captures_faded_prop {#1} {}}
	\tl_if_empty:nF {#4} {\prop_gput:Nnn \g__pgfgo_captures_marks_prop {#1} {#4}}
}

%TERMINA LA LAMINA DE LA PIEDRA QUE SE VEIA EN #1; #2 ES EL ULTIMO CUADRO EN QUE SE VE.
\cs_new_protected:Npn \__pgfgo_sgfanim_end_stone:nn #1#2 {
	\prop_pop:NnNT \l__pgfgo_sgfanim_active_prop {#1} \l__pgfgo_sgfanim_old_tl {
		\seq_put_right:Ne \l__pgfgo_sgfanim_stones_seq {
			{\l__pgfgo_sgfanim_old_tl}
			{\prop_item:NV \l__pgfgo_sgfanim_start_prop \l__pgfgo_sgfanim_old_tl}
			{\int_eval:n {#2 - \prop_item:NV \l__pgfgo_sgfanim_start_prop \l__pgfgo_sgfanim_old_tl + 1}}
		}
	}
}

%EL CUADRO #1: SU LAMINA, Y LAS LAMINAS DE LAS PIEDRAS QUE CAMBIARON.
\cs_new_protected:Npn \__pgfgo_sgfanim_layers_frame:n #1 {
	\prop_put:Nne \l__pgfgo_sgfanim_own_prop {#1} {\int_use:N \g__pgfgo_sgfanim_layer_int}
	\group_begin:
		\bool_set_true:N \l_pgfgo_captures_overlay_bool
		\clist_set_eq:NN \l_pgfgo_goban_layers_clist \c__pgfgo_sgfanim_top_layers_clist
		\__pgfgo_sgfanim_layer:nn
			{\__pgfgo_sgfanim_collect: \__pgfgo_sgfanim_game:n {#1}}
			{\pgfgo_sgf_comment:n {#1}}
	\group_end:
	%LO QUE QUEDO EN CADA PUNTO (LAS PROPIEDADES DE LAS CAPTURAS SON GLOBALES; LAS LAMINAS DE LAS PIEDRAS
	%LAS VACIAN). LA FIRMA DE CADA PUNTO VA EN SU PROPIA VARIABLE, CON EL CUADRO AL QUE PERTENECE, PARA
	%COMPARAR LOS DOS CUADROS SIN BUSCAR EN LISTAS LARGAS.
	\tl_set:Ne \l__pgfgo_sgfanim_stamp_tl {\int_use:N \g__pgfgo_sgfanim_run_int . \int_eval:n {#1}}
	\tl_set:Ne \l__pgfgo_sgfanim_last_stamp_tl {\int_use:N \g__pgfgo_sgfanim_run_int . \int_eval:n {#1 - 1}}
	\prop_set_eq:NN \l__pgfgo_sgfanim_cur_prop \g__pgfgo_captures_pending_prop
	\prop_map_inline:Nn \l__pgfgo_sgfanim_cur_prop {
		\__pgfgo_sgfanim_point_vars:n {##1}
		\tl_set_eq:cN {l__pgfgo_sgfanim_new_stamp_ ##1 _tl} \l__pgfgo_sgfanim_stamp_tl
		\tl_set:ce {l__pgfgo_sgfanim_new_sig_ ##1 _tl} {
			{\exp_not:n {##2}}
			{\prop_if_in:NnTF \g__pgfgo_captures_faded_prop {##1} {1} {0}}
			{\prop_item:Nn \g__pgfgo_captures_marks_prop {##1}}
		}
	}
	%LAS PIEDRAS QUE YA NO SE VEN IGUAL TERMINAN EN EL CUADRO ANTERIOR.
	\prop_map_inline:Nn \l__pgfgo_sgfanim_prev_prop {
		\bool_lazy_and:nnF
			{\tl_if_eq_p:cN {l__pgfgo_sgfanim_new_stamp_ ##1 _tl} \l__pgfgo_sgfanim_stamp_tl}
			{\tl_if_eq_p:cc {l__pgfgo_sgfanim_new_sig_ ##1 _tl} {l__pgfgo_sgfanim_old_sig_ ##1 _tl}}
			{\__pgfgo_sgfanim_end_stone:nn {##1} {#1 - 1}}
	}
	%LAS QUE APARECEN O CAMBIAN, EMPIEZAN.
	\group_begin:
		\clist_set_eq:NN \l_pgfgo_goban_layers_clist \c__pgfgo_sgfanim_top_layers_clist
		\prop_map_inline:Nn \l__pgfgo_sgfanim_cur_prop {
			\bool_lazy_and:nnF
				{\tl_if_eq_p:cN {l__pgfgo_sgfanim_old_stamp_ ##1 _tl} \l__pgfgo_sgfanim_last_stamp_tl}
				{\tl_if_eq_p:cc {l__pgfgo_sgfanim_new_sig_ ##1 _tl} {l__pgfgo_sgfanim_old_sig_ ##1 _tl}}
				{\exp_args:Nnv \__pgfgo_sgfanim_new_stone:nn {##1} {l__pgfgo_sgfanim_new_sig_ ##1 _tl}}
		}
	\group_end:
	\prop_map_inline:Nn \l__pgfgo_sgfanim_cur_prop {
		\tl_set_eq:cc {l__pgfgo_sgfanim_old_stamp_ ##1 _tl} {l__pgfgo_sgfanim_new_stamp_ ##1 _tl}
		\tl_set_eq:cc {l__pgfgo_sgfanim_old_sig_ ##1 _tl} {l__pgfgo_sgfanim_new_sig_ ##1 _tl}
	}
	\prop_map_inline:Nn \g__pgfgo_sgfanim_new_prop {
		\prop_put:Nnn \l__pgfgo_sgfanim_active_prop {##1} {##2}
		\prop_put:Nnn \l__pgfgo_sgfanim_start_prop {##2} {#1}
	}
	\prop_gclear:N \g__pgfgo_sgfanim_new_prop
	\prop_set_eq:NN \l__pgfgo_sgfanim_prev_prop \l__pgfgo_sgfanim_cur_prop
}

%ARMA TODAS LAS LAMINAS (DESPUES DE \pgfgo_sgfanimation_setup:nn).
\cs_new_protected:Npn \pgfgo_sgfanimation_layers: {
	\int_gincr:N \g__pgfgo_sgfanim_run_int
	\int_gzero:N \g__pgfgo_sgfanim_layer_int
	\prop_clear:N \l__pgfgo_sgfanim_prev_prop
	\prop_clear:N \l__pgfgo_sgfanim_active_prop
	\prop_clear:N \l__pgfgo_sgfanim_start_prop
	\prop_clear:N \l__pgfgo_sgfanim_own_prop
	\seq_clear:N \l__pgfgo_sgfanim_stones_seq
	%LA LAMINA 0, EL TABLERO, DA EL TAMANO DE TODAS.
	\group_begin:
		\clist_set_eq:NN \l_pgfgo_goban_layers_clist \c__pgfgo_sgfanim_board_layers_clist
		\__pgfgo_sgfanim_layer:nn {} {}
	\group_end:
	\tl_set_eq:NN \l_pgfgo_goban_bbox_tl \g_pgfgo_goban_bbox_tl
	\int_step_inline:nnn {\l__pgfgo_sgfanim_from_int} {\l__pgfgo_sgfanim_to_int}
		{\__pgfgo_sgfanim_layers_frame:n {##1}}
	\prop_map_inline:Nn \l__pgfgo_sgfanim_active_prop
		{\__pgfgo_sgfanim_end_stone:nn {##1} {\l__pgfgo_sgfanim_to_int}}
}

%EL timeline DE animate: UNA LINEA POR CUADRO, CON TRES PILAS (TABLERO; PIEDRAS; LAMINA DEL CUADRO).
\cs_new_protected:Npn \__pgfgo_sgfanim_timeline:n #1 {
	\prop_clear:N \l_tmpa_prop
	\seq_map_inline:Nn \l__pgfgo_sgfanim_stones_seq {\__pgfgo_sgfanim_timeline_stone:nnn ##1}
	\iow_open:Nn \g__pgfgo_sgfanim_iow {#1}
	\int_step_inline:nnn {\l__pgfgo_sgfanim_from_int} {\l__pgfgo_sgfanim_to_int} {
		\iow_now:Ne \g__pgfgo_sgfanim_iow {
			::
			\int_compare:nNnT {##1} = {\l__pgfgo_sgfanim_from_int} {0x0}
			;
			\prop_item:Nn \l_tmpa_prop {##1}
			;
			\prop_item:Nn \l__pgfgo_sgfanim_own_prop {##1}
		}
	}
	\iow_close:N \g__pgfgo_sgfanim_iow
}
\cs_generate_variant:Nn \__pgfgo_sgfanim_timeline:n {V}
\cs_new_protected:Npn \__pgfgo_sgfanim_timeline_stone:nnn #1#2#3 {
	\prop_get:NnNTF \l_tmpa_prop {#2} \l_tmpa_tl
		{\prop_put:Nne \l_tmpa_prop {#2} {\l_tmpa_tl , #1x#3}}
		{\prop_put:Nnn \l_tmpa_prop {#2} {#1x#3}}
}

%EL CUADRO #1 ARMADO CON SUS LAMINAS, UNA SOBRE OTRA (PARA COMPROBAR QUE ES IGUAL AL CUADRO ENTERO).
\cs_new_protected:Npn \pgfgo_sgfanimation_layers_frame:n #1 {
	\mode_leave_vertical:
	\hbox:n {
		\hbox_overlap_right:n {\box_use:c {g__pgfgo_sgfanim_0_box}}
		\seq_map_inline:Nn \l__pgfgo_sgfanim_stones_seq {\__pgfgo_sgfanim_overlap:nnnn {#1} ##1}
		\box_use:c {g__pgfgo_sgfanim_ \prop_item:Nn \l__pgfgo_sgfanim_own_prop {#1} _box}
	}
}
\cs_new_protected:Npn \__pgfgo_sgfanim_overlap:nnnn #1#2#3#4 {
	\int_compare:nT {#3 <= #1 < #3 + #4}
		{\hbox_overlap_right:n {\box_use:c {g__pgfgo_sgfanim_ #2 _box}}}
}

%UNA LAMINA Y EL CAMBIO DE CUADRO (ARMADAS DE UNA VEZ: SUMARLAS UNA POR UNA ES CUADRATICO).
\cs_new:Npn \__pgfgo_sgfanim_frame_item:n #1 {\exp_not:n {\box_use:c {g__pgfgo_sgfanim_ #1 _box} \newframe}}

%LA ANIMACION POR CAPAS: LAS LAMINAS, UNA POR CUADRO DE animate, Y EL timeline QUE DICE CUALES SE VEN.
\cs_new_protected:Npn \__pgfgo_sgfanim_layered: {
	\pgfgo_sgfanimation_layers:
	\int_gincr:N \g__pgfgo_sgfanim_file_int
	\tl_set:Ne \l__pgfgo_sgfanim_timeline_tl {\c_sys_jobname_str -pgfgo- \int_use:N \g__pgfgo_sgfanim_file_int .tln}
	%animate LEE EL timeline SIN COMILLAS: UN ESPACIO EN EL NOMBRE DEL ARCHIVO LO CORTA. LAS LLAVES
	%DE timeline = {...} PROTEGEN LAS COMAS Y LOS = DEL NOMBRE.
	\tl_replace_all:Nnn \l__pgfgo_sgfanim_timeline_tl {~} {_}
	\__pgfgo_sgfanim_timeline:V \l__pgfgo_sgfanim_timeline_tl
	\tl_set:Ne \l_tmpb_tl {\int_step_function:nnN {0} {\g__pgfgo_sgfanim_layer_int - 2} \__pgfgo_sgfanim_frame_item:n}
	\mode_leave_vertical:
	\use:e {
		\exp_not:N \begin{animateinline}
			[\exp_not:V \l__pgfgo_sgfanim_animate_tl, timeline = {\l__pgfgo_sgfanim_timeline_tl}]
			{\exp_not:V \l__pgfgo_sgfanim_fps_tl}
			\exp_not:V \l_tmpb_tl
			\exp_not:N \box_use:c {g__pgfgo_sgfanim_ \int_eval:n {\g__pgfgo_sgfanim_layer_int - 1} _box}
		\exp_not:N \end{animateinline}
	}
}

%LA ANIMACION SIN CAPAS: CADA CUADRO ES UN goban ENTERO.
\cs_new_protected:Npn \__pgfgo_sgfanim_frames: {
	\use:e {
		\exp_not:N \begin{animateinline}
			[\exp_not:V \l__pgfgo_sgfanim_animate_tl] {\exp_not:V \l__pgfgo_sgfanim_fps_tl}
		\exp_not:N \multiframe
			{\int_eval:n {\l__pgfgo_sgfanim_to_int - \l__pgfgo_sgfanim_from_int + 1}}
			{iPgfgoFrame = \int_use:N \l__pgfgo_sgfanim_from_int + 1}
			{\exp_not:N \pgfgo_sgfanimation_frame:n {\exp_not:N \iPgfgoFrame}}
		\exp_not:N \end{animateinline}
	}
}

\cs_new_protected:Npn \pgfgo_sgfanimation:nn #1#2 {
	\group_begin:
		\pgfgo_sgfanimation_setup:nn {#1} {#2}
		\bool_if:NTF \l__pgfgo_sgfanim_layers_bool
			{\__pgfgo_sgfanim_layered:}
			{\__pgfgo_sgfanim_frames:}
	\group_end:
}

\NewDocumentCommand{\sgfanimation}{O{}m}{
	\__pgfgo_sgf_if_kernel:n {
		\cs_if_exist:NTF \animateinline
			{\pgfgo_sgfanimation:nn {#1} {#2}}
			{\msg_error:nn {pgfgo} {sgf-animation-animate}}
	}
}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%--------------------------------SERIE DE DIAGRAMAS---------------------------------------------%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%\sgfdiagrams[<opciones>]{<archivo>} DIBUJA LA PARTIDA COMO EN LOS LIBROS: UN DIAGRAMA CADA step JUGADAS
%(1-50, 51-100, ...). CADA UNO PARTE DE LA POSICION REAL (LAS JUGADAS ANTERIORES SIN NUMERO, CON LAS
%CAPTURAS), Y DEBAJO LLEVA SU EPIGRAFE ("Diagram 2 (51-100)") Y SUS NOTAS "N at M". SE USA FUERA DE goban.

\int_new:N \l__pgfgo_sgfdiag_from_int
\int_new:N \l__pgfgo_sgfdiag_to_int
\tl_new:N \l__pgfgo_sgfdiag_layout_tl
\tl_new:N \l__pgfgo_sgfdiag_goban_tl
\tl_new:N \l__pgfgo_sgfdiag_variation_tl
\tl_new:N \l__pgfgo_sgfdiag_title_tl
\tl_new:N \l__pgfgo_sgfdiag_font_tl
\bool_new:N \l__pgfgo_sgfdiag_numbers_bool
\tl_new:N \l__pgfgo_sgfdiag_last_tl
\bool_new:N \l__pgfgo_sgfdiag_notes_bool
\bool_new:N \l__pgfgo_sgfdiag_comments_bool
\tl_new:N \l__pgfgo_sgfdiag_comment_font_tl
\tl_new:N \l__pgfgo_sgfdiag_comment_align_tl
\bool_new:N \l__pgfgo_sgfdiag_root_bool
\tl_new:N \l__pgfgo_sgfdiag_comment_separator_tl
\tl_new:N \l__pgfgo_sgfdiag_comment_position_tl
\tl_new:N \l__pgfgo_sgfdiag_comment_width_tl
\dim_new:N \l__pgfgo_sgfdiag_comment_sep_dim
\tl_new:N \l__pgfgo_sgfdiag_comment_height_tl
\bool_new:N \l__pgfgo_sgfdiag_comment_first_bool
%EL NUMERO DELANTE DE CADA COMENTARIO (comments/number).
\cs_new:Npn \__pgfgo_sgfdiag_comment_number:n #1 {}
\bool_new:N \l__pgfgo_sgfdiag_view_bool
\bool_new:N \l__pgfgo_sgfdiag_partial_bool
\tl_new:N \l__pgfgo_sgfdiag_partial_tl
\bool_new:N \l__pgfgo_sgfdiag_figures_bool
\bool_new:N \l__pgfgo_sgfdiag_result_bool
\tl_new:N \l__pgfgo_sgfdiag_result_title_tl
\tl_new:N \l__pgfgo_sgfdiag_result_format_tl
\tl_new:N \l__pgfgo_sgfdiag_black_tl
\tl_new:N \l__pgfgo_sgfdiag_white_tl
%LAS VARIANTES QUE SE DIBUJAN: LAS COMENTADAS O TODAS (HASTA LA PROFUNDIDAD depth) Y LAS DE LA LISTA.
\bool_new:N \l__pgfgo_sgfdiag_var_commented_bool
\bool_new:N \l__pgfgo_sgfdiag_var_all_bool
\int_new:N \l__pgfgo_sgfdiag_var_depth_int
\bool_new:N \l__pgfgo_sgfdiag_marks_bool
\int_new:N \l__pgfgo_sgfdiag_var_from_int
\seq_new:N \l__pgfgo_sgfdiag_var_paths_seq
\tl_new:N \l__pgfgo_sgfdiag_var_title_tl
%LA PARTIDA: EL ARCHIVO, SU TAMANO, SU komi, SUS JUGADAS Y LA ULTIMA QUE SE DIBUJA.
\tl_new:N \l__pgfgo_sgfdiag_file_tl
\tl_new:N \l__pgfgo_sgfdiag_board_tl
\tl_new:N \l__pgfgo_sgfdiag_komi_tl
\int_new:N \l__pgfgo_sgfdiag_total_int
\int_new:N \l__pgfgo_sgfdiag_last_int

%LA ALINEACION #2 DE LOS COMENTARIOS (left, right, center O justify), COMO CODIGO EN #1.
\msg_new:nnn {pgfgo} {comments-align}
	{Unknown~comments~align~'#1':~use~left,~right,~center~or~justify.}
\cs_new_protected:Npn \__pgfgo_sgfdiag_comment_align:Nn #1#2 {
	\str_case:nnF {#2} {
		{left}		{\tl_set:Nn #1 {\raggedright}}
		{right}		{\tl_set:Nn #1 {\raggedleft}}
		{center}	{\tl_set:Nn #1 {\centering}}
		{justify}	{\tl_clear:N #1}
	}{
		\msg_error:nnn {pgfgo} {comments-align} {#2}
	}
}

\keys_define:nn {pgfgo / sgf~diagrams} {
	%LOS DIAGRAMAS SON LOS MISMOS (Y CON EL MISMO NUMERO) QUE SIN from: SOLO SE DIBUJAN LOS QUE TIENEN JUGADAS
	%DESDE from, Y EL PRIMERO EMPIEZA EN from.
	from						.int_set:N	= \l__pgfgo_sgfdiag_from_int,
	from						.initial:n	= {1},
	%last (-1): LA ULTIMA JUGADA.
	to							.code:n			= {\__pgfgo_sgf_set_to:Nnn \l__pgfgo_sgfdiag_to_int {-1} {#1}},
	to							.initial:n	= {last},
	%SIN numbers, LAS JUGADAS DE CADA DIAGRAMA NO LLEVAN NUMERO. last~mark: COMO EN \sgf, EN CADA DIAGRAMA.
	numbers					.bool_set:N	= \l__pgfgo_sgfdiag_numbers_bool,
	numbers					.default:n	= {true},
	numbers					.initial:n	= {true},
	%marks: COMO EN \sgf, EN CADA DIAGRAMA.
	marks						.bool_set:N	= \l__pgfgo_sgfdiag_marks_bool,
	marks						.default:n	= {true},
	marks						.initial:n	= {true},
	last~mark				.code:n			= {
															\str_if_eq:nnTF {#1} {false}
																{\tl_clear:N \l__pgfgo_sgfdiag_last_tl}
																{\tl_set:Nn \l__pgfgo_sgfdiag_last_tl {#1}}
														},
	last~mark				.initial:n	= {false},
	goban						.tl_set:N		= \l__pgfgo_sgfdiag_goban_tl,
	%CADA DIAGRAMA ES UN goban CON NOMBRE: EL DE name Y EL NUMERO DE SU EPIGRAFE (tablero1, tablero3a).
	name						.tl_set:N		= \l__pgfgo_sgfdiag_name_tl,
	variation				.tl_set:N		= \l__pgfgo_sgfdiag_variation_tl,
	notes						.bool_set:N	= \l__pgfgo_sgfdiag_notes_bool,
	notes						.default:n	= {true},
	notes						.initial:n	= {true},
	title						.tl_set:N		= \l__pgfgo_sgfdiag_title_tl,
	title						.initial:n	= {\pgfgo_text:n {diagram}},
	caption					.code:n			= {\keys_set:nn {pgfgo / sgf~diagrams / caption} {#1}},
	%LOS COMENTARIOS DE LAS JUGADAS DEL DIAGRAMA, DEBAJO DE SUS NOTAS.
	comments				.code:n			= {\keys_set:nn {pgfgo / sgf~diagrams / comments} {#1}},
	comments				.default:n	= {true},
	game						.code:n			= {\int_set:Nn \l_pgfgo_kernel_sgf_game_int {#1}},
	view						.bool_set:N	= \l__pgfgo_sgfdiag_view_bool,
	view						.default:n	= {true},
	view						.initial:n	= {true},
	%auto: LOS TABLEROS MUESTRAN SOLO LA PARTE QUE USA LA PARTIDA (SI NO HAY VISTA).
	partial					.code:n			= {\__pgfgo_sgf_partial:NNn \l__pgfgo_sgfdiag_partial_bool \l__pgfgo_sgfdiag_partial_tl {#1}},
	partial					.initial:n	= {false},
	%SI EL ARCHIVO TIENE FIGURAS (FG), CADA FIGURA ES UN DIAGRAMA (CON SU NOMBRE COMO EPIGRAFE).
	figures					.bool_set:N	= \l__pgfgo_sgfdiag_figures_bool,
	figures					.default:n	= {true},
	figures					.initial:n	= {true},
	annotations			.bool_set:N	= \l__pgfgo_sgfdiag_annotations_bool,
	annotations			.default:n	= {true},
	chat						.bool_set:N	= \l__pgfgo_sgfdiag_chat_bool,
	chat						.default:n	= {true},
	%EL RESULTADO Y EL PUNTAJE DEBAJO DEL ULTIMO DIAGRAMA.
	result					.code:n			= {\keys_set:nn {pgfgo / sgf~diagrams / result} {#1}},
	result					.default:n	= {true},
	black~name			.tl_set:N		= \l__pgfgo_sgfdiag_black_tl,
	black~name			.initial:n	= {\pgfgo_text:n {black}},
	white~name			.tl_set:N		= \l__pgfgo_sgfdiag_white_tl,
	white~name			.initial:n	= {\pgfgo_text:n {white}},
	%LAS VARIANTES COMO DIAGRAMAS, DESPUES DEL DIAGRAMA DONDE NACEN (VER /pgfgo/sgf diagrams/variations).
	variations			.code:n			= {\keys_set:nn {pgfgo / sgf~diagrams / variations} {#1}},
	variations			.default:n	= {commented},
	variation~title	.tl_set:N		= \l__pgfgo_sgfdiag_var_title_tl,
	variation~title	.initial:n	= {\pgfgo_text:n {variation~at}},
	%OPCIONES DE /pgfgo/layout SOLO PARA \sgfdiagrams (SE SUMAN A LAS DE TODO EL DOCUMENTO).
	layout					.code:n			= {\tl_put_right:Nn \l__pgfgo_sgfdiag_layout_tl {, #1}},
}

%{5, 10, 3}: DIAGRAMAS DE 5, 10, 3, 3, 3... JUGADAS. CON restart, DESDE EL SEGUNDO, CADA DIAGRAMA NUMERA
%DESDE restart/from.
\__pgfgo_sgf_numbering_keys:nnn {pgfgo / sgf~diagrams} {sgfdiag} {50}

\keys_define:nn {pgfgo / sgf~diagrams / caption} {
	font						.tl_set:N		= \l__pgfgo_sgfdiag_font_tl,
	font						.initial:n	= {\small},
	%UN EPIGRAFE MAS ANCHO QUE SU TABLERO (CON columns = auto) SE CORTA A ESTE ANCHO, SI EL TABLERO ES MAS ANGOSTO.
	min~width			.tl_set:N		= \l__pgfgo_sgfdiag_caption_min_tl,
	min~width			.initial:n	= {8em},
}

%font: LA DE LOS COMENTARIOS (VACIA: LA DEL EPIGRAFE). align: left, right, center O justify. root: EL
%COMENTARIO DE LA RAIZ (JUGADA 0), SIN NUMERO, ANTES DE LOS DEL DIAGRAMA QUE EMPIEZA EN LA JUGADA 1.
%number: LO QUE VA DELANTE DE CADA COMENTARIO (#1: EL NUMERO). separator: LO QUE VA ENTRE LOS COMENTARIOS.
%position: below, O right O left: AL COSTADO DEL DIAGRAMA, DE ANCHO width Y A sep DE EL (width = auto: LO
%QUE QUEDA DE LA CELDA O DE LA LINEA), O after: TODOS JUNTOS DESPUES DE LOS DIAGRAMAS. height: DEBAJO O AL
%COSTADO, LO QUE PASA ESA ALTURA VA DESPUES DE LOS DIAGRAMAS (none: NADA).
\keys_define:nn {pgfgo / sgf~diagrams / comments} {
	true						.code:n			= {\bool_set_true:N \l__pgfgo_sgfdiag_comments_bool},
	false						.code:n			= {\bool_set_false:N \l__pgfgo_sgfdiag_comments_bool},
	font						.tl_set:N		= \l__pgfgo_sgfdiag_comment_font_tl,
	align						.code:n			= {\__pgfgo_sgfdiag_comment_align:Nn \l__pgfgo_sgfdiag_comment_align_tl {#1}},
	align						.initial:n	= {left},
	root						.bool_set:N	= \l__pgfgo_sgfdiag_root_bool,
	root						.default:n	= {true},
	number					.code:n			= {\cs_set:Npn \__pgfgo_sgfdiag_comment_number:n ##1 {#1}},
	number					.initial:n	= {\textbf{#1}:~},
	separator				.tl_set:N		= \l__pgfgo_sgfdiag_comment_separator_tl,
	separator				.initial:n	= {\par},
	position				.choices:nn	= {below, right, left, after}
		{\tl_set_eq:NN \l__pgfgo_sgfdiag_comment_position_tl \l_keys_choice_tl},
	height					.tl_set:N		= \l__pgfgo_sgfdiag_comment_height_tl,
	height					.initial:n	= {none},
	position				.initial:n	= {below},
	width					.tl_set:N		= \l__pgfgo_sgfdiag_comment_width_tl,
	width					.initial:n	= {auto},
	sep						.dim_set:N	= \l__pgfgo_sgfdiag_comment_sep_dim,
	sep						.initial:n	= {1em},
}

%none: NINGUNA. commented: LAS QUE TIENEN COMENTARIOS. all: TODAS. depth: HASTA QUE PROFUNDIDAD; from: LAS QUE
%NACEN EN ESA JUGADA O DESPUES (commented Y all). OTRA COSA ES EL CAMINO DE UNA VARIANTE (2, 2.3.1, {R16 P17}),
%QUE SE DIBUJA SIEMPRE.
\keys_define:nn {pgfgo / sgf~diagrams / variations} {
	none						.code:n			= {
		\bool_set_false:N \l__pgfgo_sgfdiag_var_commented_bool
		\bool_set_false:N \l__pgfgo_sgfdiag_var_all_bool
		\seq_clear:N \l__pgfgo_sgfdiag_var_paths_seq
	},
	commented				.code:n			= {\bool_set_true:N \l__pgfgo_sgfdiag_var_commented_bool},
	all							.code:n			= {\bool_set_true:N \l__pgfgo_sgfdiag_var_all_bool},
	depth						.int_set:N	= \l__pgfgo_sgfdiag_var_depth_int,
	depth						.initial:n	= {1},
	from						.int_set:N	= \l__pgfgo_sgfdiag_var_from_int,
	from						.initial:n	= {1},
	unknown					.code:n			= {
		\seq_put_right:NV \l__pgfgo_sgfdiag_var_paths_seq \l_keys_key_str
	},
}

\keys_define:nn {pgfgo / sgf~diagrams / result} {
	true						.code:n			= {\bool_set_true:N \l__pgfgo_sgfdiag_result_bool},
	false						.code:n			= {\bool_set_false:N \l__pgfgo_sgfdiag_result_bool},
	title						.tl_set:N		= \l__pgfgo_sgfdiag_result_title_tl,
	title						.initial:n	= {\pgfgo_text:n {result}},
	%text: EL RESULTADO EN PALABRAS ("Black wins by resignation"); raw: COMO ESTA EN EL ARCHIVO ("B+R").
	format					.choices:nn	= {text, raw} {\tl_set_eq:NN \l__pgfgo_sgfdiag_result_format_tl \l_keys_choice_tl},
	format					.initial:n	= {text},
}
\bool_set_true:N \l__pgfgo_sgfdiag_result_bool

\keys_define:nn {pgfgo} {
	sgf~diagrams		.code:n			= {\keys_set:nn {pgfgo / sgf~diagrams} {#1}}
}

%UN DIAGRAMA (DE \sgfdiagrams O DE \sgfproblem) SE ARMA EN \l__pgfgo_sgfdiag_cell_box: EL goban CON LAS
%JUGADAS #1 A #2 (NUMERADAS DESDE #1) DE LA LINEA \l__pgfgo_sgfdiag_variation_tl, Y DEBAJO EL EPIGRAFE #3 Y
%LO QUE DIGA #4 (SE EJECUTA DESPUES DEL goban). LAS OPCIONES DEL goban QUE ELIGEN LA PARTE VISIBLE ESTAN EN
%\l__pgfgo_sgfdiag_window_tl, Y restart EN \l__pgfgo_sgfdiag_sgf_restart_tl. EN LA GRILLA (VER pgf-go-layout.sty)
%EL DIAGRAMA TIENE EL ANCHO DE LA CELDA, Y CON fit TODOS LOS TABLEROS USAN LA ESCALA QUE LLENA LA CELDA CON
%EL PRIMERO (\l__pgfgo_sgfdiag_scale_tl). \l__pgfgo_sgfdiag_align_tl ES LA ALINEACION DE LO QUE VA DEBAJO.
\tl_new:N \l__pgfgo_sgfdiag_window_tl
\tl_new:N \l__pgfgo_sgfdiag_sgf_restart_tl
\tl_new:N \l__pgfgo_sgfdiag_scale_tl
\tl_new:N \l__pgfgo_sgfdiag_align_tl
\dim_new:N \l__pgfgo_sgfdiag_width_dim
\box_new:N \l__pgfgo_sgfdiag_box
\box_new:N \l__pgfgo_sgfdiag_caption_box
\box_new:N \l__pgfgo_sgfdiag_cell_box
\box_new:N \l__pgfgo_sgfdiag_below_box
\box_new:N \g__pgfgo_sgfdiag_fit_box

%EMPIEZA UNA SERIE DE DIAGRAMAS DEL ARCHIVO #2, CON LAS OPCIONES DE layout #1.
\cs_new_protected:Npn \__pgfgo_sgfdiag_begin:Nn #1#2 {
	\box_gclear:N \g__pgfgo_sgfdiag_after_box
	\dim_set_eq:NN \l__pgfgo_sgfdiag_after_dim \linewidth
	\pgfgo_layout_begin:V #1
	\tl_clear:N \l__pgfgo_sgfdiag_scale_tl
	\tl_set:Nn \l__pgfgo_sgfdiag_file_tl {#2}
}

%CON LOS COMENTARIOS AL COSTADO, EL TABLERO Y LO QUE VA DEBAJO OCUPAN UNA COLUMNA MAS ANGOSTA: EN LA GRILLA,
%EL TABLERO (CON fit Y width = auto, LA MITAD DE LA CELDA), O LA CELDA MENOS width.
\dim_new:N \l__pgfgo_sgfdiag_total_dim
\bool_new:N \l__pgfgo_sgfdiag_side_bool
\tl_new:N \l__pgfgo_sgfdiag_caption_tl
\tl_new:N \l__pgfgo_sgfdiag_caption_code_tl
\cs_new_protected:Npn \__pgfgo_sgfdiag_draw:nnnn #1#2#3#4 {
	\box_clear:N \l__pgfgo_sgfdiag_below_box
	\tl_set:Nn \l__pgfgo_sgfdiag_caption_tl {#3}
	\bool_set:Nn \l__pgfgo_sgfdiag_side_bool
		{
			\l__pgfgo_sgfdiag_comments_bool && (
				\str_if_eq_p:Vn \l__pgfgo_sgfdiag_comment_position_tl {right} ||
				\str_if_eq_p:Vn \l__pgfgo_sgfdiag_comment_position_tl {left}
			)
		}
	\bool_lazy_and:nnT {\l__pgfgo_sgfdiag_side_bool} {\pgfgo_layout_if_grid_p:} {
		\dim_set_eq:NN \l__pgfgo_sgfdiag_total_dim \l_pgfgo_layout_cell_dim
		\str_if_eq:VnTF \l__pgfgo_sgfdiag_comment_width_tl {auto}
			{
				\pgfgo_layout_if_fit:T
					{\dim_set:Nn \l_pgfgo_layout_cell_dim {(\l__pgfgo_sgfdiag_total_dim - \l__pgfgo_sgfdiag_comment_sep_dim) / 2}}
			}
			{
				\dim_set:Nn \l_pgfgo_layout_cell_dim
					{\l__pgfgo_sgfdiag_total_dim - \l__pgfgo_sgfdiag_comment_sep_dim - (\l__pgfgo_sgfdiag_comment_width_tl)}
			}
	}
	\pgfgo_layout_if_fit:T {
		\tl_if_empty:NT \l__pgfgo_sgfdiag_scale_tl {
			\pgfgo_layout_fit:nN
				{
					\tl_set:Nn \l__pgfgo_sgfdiag_scale_tl {scale = ##1}
					\__pgfgo_sgfdiag_board:nn {#1} {#2}
				}
				\l__pgfgo_sgfdiag_box
			\tl_set:Ne \l__pgfgo_sgfdiag_scale_tl {scale = \l_pgfgo_layout_scale_tl}
		}
	}
	\__pgfgo_sgfdiag_board:nn {#1} {#2}
	%UN TABLERO MAS ANCHO QUE EL PRIMERO (OTRO PROBLEMA, OTRA VISTA) NO ENTRA CON ESA ESCALA: SOLO ESE SE ACHICA.
	\pgfgo_layout_if_fit:T {
		\dim_compare:nNnT {\box_wd:N \l__pgfgo_sgfdiag_box} > {\l_pgfgo_layout_cell_dim + 0.1pt} {
			\group_begin:
				\pgfgo_layout_fit:nN
					{
						\tl_set:Nn \l__pgfgo_sgfdiag_scale_tl {scale = ##1}
						\__pgfgo_sgfdiag_board:nn {#1} {#2}
					}
					\l__pgfgo_sgfdiag_box
				\tl_set:Ne \l__pgfgo_sgfdiag_scale_tl {scale = \l_pgfgo_layout_scale_tl}
				\__pgfgo_sgfdiag_board:nn {#1} {#2}
				\box_gset_eq:NN \g__pgfgo_sgfdiag_fit_box \l__pgfgo_sgfdiag_box
			\group_end:
			\box_set_eq:NN \l__pgfgo_sgfdiag_box \g__pgfgo_sgfdiag_fit_box
			\box_gclear:N \g__pgfgo_sgfdiag_fit_box
		}
	}
	\bool_lazy_and:nnT {\l__pgfgo_sgfdiag_side_bool} {\pgfgo_layout_if_grid_p:} {
		\str_if_eq:VnT \l__pgfgo_sgfdiag_comment_width_tl {auto}
			{\pgfgo_layout_if_fit:F {\dim_set:Nn \l_pgfgo_layout_cell_dim {\box_wd:N \l__pgfgo_sgfdiag_box}}}
	}
	\box_gclear:N \g__pgfgo_sgfdiag_side_box
	\pgfgo_layout_if_cells:TF
		{
			\__pgfgo_sgfdiag_side_width:n {\l_pgfgo_layout_cell_dim}
			\tl_set:Nn \l__pgfgo_sgfdiag_align_tl {\pgfgo_layout_par_align:}
			\dim_set_eq:NN \l__pgfgo_sgfdiag_width_dim \l_pgfgo_layout_cell_dim
			\bool_lazy_and:nnTF {! \l__pgfgo_sgfdiag_side_bool} {\pgfgo_layout_if_below_p:}
				{
					%LO DE ABAJO VA APARTE (layout/align captions), CON EL MISMO ESPACIO QUE DEBAJO DEL TABLERO.
					\hbox_set:Nn \l__pgfgo_sgfdiag_cell_box {\pgfgo_layout_place:n {\box_use:N \l__pgfgo_sgfdiag_box}}
					\vbox_set_top:Nn \l__pgfgo_sgfdiag_below_box {
						\tex_prevdepth:D \box_dp:N \l__pgfgo_sgfdiag_cell_box
						\skip_vertical:n {0.3em}
						\__pgfgo_sgfdiag_below:nn {\pgfgo_layout_par_align:} {#3}
						#4
					}
				}
				{
					\vbox_set_top:Nn \l__pgfgo_sgfdiag_cell_box {
						\pgfgo_layout_place:n {\box_use:N \l__pgfgo_sgfdiag_box}
						\skip_vertical:n {0.3em}
						\__pgfgo_sgfdiag_below:nn {\pgfgo_layout_par_align:} {#3}
						#4
					}
				}
		}
		{
			\tl_set:Nn \l__pgfgo_sgfdiag_align_tl {\centering}
			%EL DIAGRAMA TIENE EL ANCHO DEL TABLERO. UN EPIGRAFE MAS ANCHO SE CORTA EN LINEAS (COMO EN LA GRILLA),
			%PERO EL DIAGRAMA NO ES MAS ANGOSTO QUE SU PALABRA MAS LARGA NI QUE caption/min width (SI ENTRA ASI EN
			%UNA LINEA, NO SE CORTA). EL EPIGRAFE CORTADO ES UN PARRAFO DE LA CELDA (NO UNA CAJA): SUS LINEAS Y LO
			%QUE SIGUE LLEVAN EL INTERLINEADO DE SIEMPRE.
			\hbox_set:Nn \l__pgfgo_sgfdiag_caption_box {\l__pgfgo_sgfdiag_font_tl #3}
			\dim_set:Nn \l__pgfgo_sgfdiag_width_dim {\box_wd:N \l__pgfgo_sgfdiag_box}
			\dim_compare:nNnT {\box_wd:N \l__pgfgo_sgfdiag_caption_box} > {\l__pgfgo_sgfdiag_width_dim} {
				\__pgfgo_sgfdiag_widest_word:n {#3}
				\__pgfgo_sgfdiag_caption_min:
				\dim_set:Nn \l__pgfgo_sgfdiag_width_dim {
					\dim_max:nn {\l__pgfgo_sgfdiag_width_dim} {\dim_max:nn {\g__pgfgo_sgfdiag_word_dim} {\g__pgfgo_sgfdiag_caption_min_dim}}
				}
			}
			\dim_compare:nNnTF {\box_wd:N \l__pgfgo_sgfdiag_caption_box} > {\l__pgfgo_sgfdiag_width_dim}
				{
					\box_clear:N \l__pgfgo_sgfdiag_caption_box
					\tl_set:Nn \l__pgfgo_sgfdiag_caption_code_tl {
						\group_begin:
							\__pgfgo_sgfdiag_par_setup:N \l__pgfgo_sgfdiag_width_dim
							\centering \l__pgfgo_sgfdiag_font_tl #3 \par
						\group_end:
					}
				}
				{
					\tl_set:Nn \l__pgfgo_sgfdiag_caption_code_tl {
						\hbox_to_wd:nn {\l__pgfgo_sgfdiag_width_dim} {\hfil \box_use:N \l__pgfgo_sgfdiag_caption_box \hfil}
					}
				}
			\__pgfgo_sgfdiag_side_width:n {\l__pgfgo_sgfdiag_width_dim}
			\vbox_set_top:Nn \l__pgfgo_sgfdiag_cell_box {
				\hbox_to_wd:nn {\l__pgfgo_sgfdiag_width_dim} {\hfil \box_use:N \l__pgfgo_sgfdiag_box \hfil}
				\skip_vertical:n {0.3em}
				\l__pgfgo_sgfdiag_caption_code_tl
				#4
			}
		}
	\bool_if:NT \l__pgfgo_sgfdiag_side_bool {\__pgfgo_sgfdiag_side:}
	%LA CELDA VUELVE A SU ANCHO (LA USAN LA DISPOSICION Y EL DIAGRAMA SIGUIENTE).
	\bool_lazy_and:nnT {\l__pgfgo_sgfdiag_side_bool} {\pgfgo_layout_if_grid_p:}
		{\dim_set_eq:NN \l_pgfgo_layout_cell_dim \l__pgfgo_sgfdiag_total_dim}
}

%EL ANCHO DE LA PALABRA MAS LARGA DEL EPIGRAFE #1 (EN \g__pgfgo_sgfdiag_word_dim): CON \hsize = 0pt CADA
%PALABRA VA EN SU LINEA (SIN GUIONES); SE SACAN LAS LINEAS DE ABAJO HACIA ARRIBA Y SE MIDE CADA UNA.
\dim_new:N \g__pgfgo_sgfdiag_word_dim
\box_new:N \l__pgfgo_sgfdiag_words_box
\cs_new_protected:Npn \__pgfgo_sgfdiag_widest_word:n #1 {
	\dim_gzero:N \g__pgfgo_sgfdiag_word_dim
	\vbox_set:Nn \l__pgfgo_sgfdiag_words_box {
		\dim_set_eq:NN \hsize \c_zero_dim
		\int_set:Nn \hyphenpenalty {10000}
		\int_set:Nn \exhyphenpenalty {10000}
		\dim_set:Nn \hfuzz {\c_max_dim}
		\int_set:Nn \hbadness {10000}
		\noindent \l__pgfgo_sgfdiag_font_tl #1 \par
		\__pgfgo_sgfdiag_widest_word_loop:
	}
}
%EL ANCHO MINIMO DEL EPIGRAFE CORTADO (EN \g__pgfgo_sgfdiag_caption_min_dim): min width EN LA FUENTE DEL
%EPIGRAFE, PERO NO MAS QUE EL EPIGRAFE EN UNA LINEA (\l__pgfgo_sgfdiag_caption_box).
\dim_new:N \g__pgfgo_sgfdiag_caption_min_dim
\cs_new_protected:Npn \__pgfgo_sgfdiag_caption_min: {
	\group_begin:
		\l__pgfgo_sgfdiag_font_tl
		\dim_gset:Nn \g__pgfgo_sgfdiag_caption_min_dim
			{\dim_min:nn {\l__pgfgo_sgfdiag_caption_min_tl} {\box_wd:N \l__pgfgo_sgfdiag_caption_box}}
	\group_end:
}
\cs_new_protected:Npn \__pgfgo_sgfdiag_widest_word_loop: {
	\tex_unskip:D \tex_unpenalty:D \tex_unskip:D
	\box_set_to_last:N \l_tmpa_box
	\box_if_empty:NF \l_tmpa_box {
		\hbox_set:Nn \l_tmpa_box {\hbox_unpack:N \l_tmpa_box}
		\dim_gset:Nn \g__pgfgo_sgfdiag_word_dim {\dim_max:nn {\g__pgfgo_sgfdiag_word_dim} {\box_wd:N \l_tmpa_box}}
		\__pgfgo_sgfdiag_widest_word_loop:
	}
}

%EL ANCHO DE LOS COMENTARIOS AL COSTADO DE UNA COLUMNA DE ANCHO #1: width, O CON auto LO QUE QUEDA DE LA
%CELDA O DE LA LINEA. AL MENOS 3em.
\cs_new_protected:Npn \__pgfgo_sgfdiag_side_width:n #1 {
	\bool_if:NT \l__pgfgo_sgfdiag_side_bool {
		\str_if_eq:VnTF \l__pgfgo_sgfdiag_comment_width_tl {auto}
			{
				\dim_set:Nn \l__pgfgo_sgfdiag_side_dim {
					\pgfgo_layout_if_grid:TF {\l__pgfgo_sgfdiag_total_dim} {\linewidth}
					- #1 - \l__pgfgo_sgfdiag_comment_sep_dim
				}
			}
			{\dim_set:Nn \l__pgfgo_sgfdiag_side_dim {\l__pgfgo_sgfdiag_comment_width_tl}}
		\dim_compare:nNnT {\l__pgfgo_sgfdiag_side_dim} < {3em} {\dim_set:Nn \l__pgfgo_sgfdiag_side_dim {3em}}
	}
}

%PONE LOS COMENTARIOS AL COSTADO DE LA CELDA, CON SU PRIMERA LINEA ARRIBA, A LA ALTURA DEL TABLERO. LA CELDA
%CONSERVA SU LINEA DE BASE; EN LA GRILLA, OCUPA EL ANCHO DE LA CELDA ENTERA.
\cs_new_protected:Npn \__pgfgo_sgfdiag_side: {
	\box_if_empty:NF \g__pgfgo_sgfdiag_side_box {
		\hbox_set:Nn \l_tmpb_box {
			\box_move_up:nn {\box_ht:N \l__pgfgo_sgfdiag_cell_box - \box_ht:N \g__pgfgo_sgfdiag_side_box}
				{\box_use:N \g__pgfgo_sgfdiag_side_box}
		}
		\hbox_set:Nn \l__pgfgo_sgfdiag_cell_box {
			\str_if_eq:VnTF \l__pgfgo_sgfdiag_comment_position_tl {right}
				{\box_use:N \l__pgfgo_sgfdiag_cell_box \skip_horizontal:N \l__pgfgo_sgfdiag_comment_sep_dim \box_use:N \l_tmpb_box}
				{\box_use:N \l_tmpb_box \skip_horizontal:N \l__pgfgo_sgfdiag_comment_sep_dim \box_use:N \l__pgfgo_sgfdiag_cell_box}
		}
		\pgfgo_layout_if_cells:T {
			\hbox_set_to_wd:Nnn \l__pgfgo_sgfdiag_cell_box {\l__pgfgo_sgfdiag_total_dim}
				{\box_use:N \l__pgfgo_sgfdiag_cell_box \hfil}
		}
	}
}
%EL MISMO DIAGRAMA, PUESTO EN LA DISPOSICION.
\cs_new_protected:Npn \__pgfgo_sgfdiag_add:nnnn #1#2#3#4 {
	\__pgfgo_sgfdiag_draw:nnnn {#1} {#2} {#3} {#4}
	\pgfgo_layout_add:NN \l__pgfgo_sgfdiag_cell_box \l__pgfgo_sgfdiag_below_box
}
%UN DIAGRAMA SOLO EN SU FILA: LO DE ABAJO, SI VINO APARTE, VUELVE A LA CELDA.
\cs_new_protected:Npn \__pgfgo_sgfdiag_join: {
	\box_if_empty:NF \l__pgfgo_sgfdiag_below_box {
		\vbox_set_top:Nn \l__pgfgo_sgfdiag_cell_box {
			\box_use:N \l__pgfgo_sgfdiag_cell_box
			\nointerlineskip
			\box_use_drop:N \l__pgfgo_sgfdiag_below_box
		}
	}
}

%EL goban DEL DIAGRAMA (JUGADAS #1 A #2) EN \l__pgfgo_sgfdiag_box. CON name, SE LLAMA name SEGUIDO DE
%\l__pgfgo_sgfdiag_suffix_tl.
\tl_new:N \l__pgfgo_sgfdiag_suffix_tl
\cs_new_protected:Npn \__pgfgo_sgfdiag_board:nn #1#2 {
	\__pgfgo_sgf_shown_clear:
	\hbox_set:Nn \l__pgfgo_sgfdiag_box {
		\pgfgo_layout_restore_goban:
		%LA ESCALA DE fit NO CAMBIA EL GROSOR DE LAS LINEAS (VER pgf-go-goban.sty).
		\tl_if_empty:NF \l__pgfgo_sgfdiag_scale_tl {\bool_set_true:N \l_pgfgo_goban_fit_bool}
		\use:e {
			\exp_not:N \begin{goban}
				[
					\l__pgfgo_sgfdiag_board_tl, captures, notes,
					\exp_not:V \l__pgfgo_sgfdiag_window_tl,
					\exp_not:V \l__pgfgo_sgfdiag_goban_tl,
					\exp_not:V \l__pgfgo_sgfdiag_scale_tl
					\tl_if_empty:NF \l__pgfgo_sgfdiag_name_tl
						{, name = {\exp_not:V \l__pgfgo_sgfdiag_name_tl \exp_not:V \l__pgfgo_sgfdiag_suffix_tl}}
				]
		}
			%COMO EN LOS LIBROS, LAS CAPTURAS DEL TRAMO NUMERADO NO SE QUITAN (SE VEN EN EL DIAGRAMA SIGUIENTE).
			\bool_set_true:N \l__pgfgo_sgf_keep_numbered_bool
			\tl_set_eq:NN \l__pgfgo_sgf_first_tl \l__pgfgo_sgfdiag_first_tl
			\__pgfgo_sgf_extent_add:
			\use:e {
				\exp_not:N \pgfgo_sgf:nn
					{
						from = \int_eval:n {#1},
						to = \int_eval:n {#2},
						variation = {\exp_not:V \l__pgfgo_sgfdiag_variation_tl},
						restart = {\exp_not:V \l__pgfgo_sgfdiag_sgf_restart_tl},
						numbers = \bool_if:NTF \l__pgfgo_sgfdiag_numbers_bool {true} {false},
						marks = \bool_if:NTF \l__pgfgo_sgfdiag_marks_bool {true} {false},
						last~mark = {\tl_if_empty:NTF \l__pgfgo_sgfdiag_last_tl {false} {\exp_not:V \l__pgfgo_sgfdiag_last_tl}}
					}
					{\exp_not:V \l__pgfgo_sgfdiag_file_tl}
			}
		\end{goban}
	}
}

%DEBAJO DEL EPIGRAFE: UN PARRAFO DEL ANCHO DEL DIAGRAMA (#1: \centering, \raggedright, ETC.).
\cs_new_protected:Npn \__pgfgo_sgfdiag_below:nn #1#2 {
	\hbox:n {\parbox[t]{\l__pgfgo_sgfdiag_width_dim} {#1 \l__pgfgo_sgfdiag_font_tl #2}}
}

%LOS COMENTARIOS #1 CON SU ALINEACION Y SU FUENTE (SI NO TIENEN, LA DEL EPIGRAFE): DEBAJO DEL EPIGRAFE, O AL
%COSTADO, EN \g__pgfgo_sgfdiag_side_box (DE ANCHO \l__pgfgo_sgfdiag_side_dim), QUE PONE \__pgfgo_sgfdiag_side:.
\box_new:N \g__pgfgo_sgfdiag_side_box
\dim_new:N \l__pgfgo_sgfdiag_side_dim
%LOS COMENTARIOS SE ARMAN EN UNA CAJA VERTICAL DE PARRAFOS (COMO LOS DE UN \parbox), QUE SE PUEDE CORTAR:
%CON height, LO QUE NO ENTRA VA A \g__pgfgo_sgfdiag_after_box, QUE SE ESCRIBE DESPUES DE LOS DIAGRAMAS.
\box_new:N \l__pgfgo_sgfdiag_comments_box
\box_new:N \l__pgfgo_sgfdiag_top_box
\box_new:N \g__pgfgo_sgfdiag_after_box
\dim_new:N \l__pgfgo_sgfdiag_after_dim
\cs_new_protected:Npn \__pgfgo_sgfdiag_comments_below:n #1 {
	\str_case:VnF \l__pgfgo_sgfdiag_comment_position_tl {
		{after} {
			\__pgfgo_sgfdiag_comments_set:Nn \l__pgfgo_sgfdiag_after_dim {#1}
			\__pgfgo_sgfdiag_after_add:
		}
		{below} {
			\__pgfgo_sgfdiag_comments_set:Nn \l__pgfgo_sgfdiag_width_dim {#1}
			\__pgfgo_sgfdiag_comments_cut:
			\__pgfgo_sgfdiag_comments_use:
		}
	}{
		\__pgfgo_sgfdiag_comments_set:Nn \l__pgfgo_sgfdiag_side_dim {#1}
		\__pgfgo_sgfdiag_comments_cut:
		\hbox_gset:Nn \g__pgfgo_sgfdiag_side_box {\__pgfgo_sgfdiag_comments_use:}
	}
}
%LA CAJA DE LOS COMENTARIOS CON LA LINEA DE BASE EN SU PRIMER RENGLON (COMO UN \parbox[t]).
\cs_new_protected:Npn \__pgfgo_sgfdiag_comments_use: {
	\vbox_top:n {\vbox_unpack:N \l__pgfgo_sgfdiag_comments_box}
}
%LOS COMENTARIOS #2 EN \l__pgfgo_sgfdiag_comments_box, DE ANCHO #1, CON SU ALINEACION Y SU FUENTE.
\cs_new_protected:Npn \__pgfgo_sgfdiag_comments_set:Nn #1#2 {
	\vbox_set:Nn \l__pgfgo_sgfdiag_comments_box {
		\__pgfgo_sgfdiag_par_setup:N #1
		\l__pgfgo_sgfdiag_comment_align_tl
		\__pgfgo_sgfdiag_comment_font:
		#2 \par
	}
}
\cs_new_protected:Npn \__pgfgo_sgfdiag_par_setup:N #1 {
	\use:c {@parboxrestore}
	\dim_set_eq:NN \hsize #1
	\dim_set_eq:NN \linewidth #1
}
\cs_new_protected:Npn \__pgfgo_sgfdiag_comment_font: {
	\tl_if_empty:NTF \l__pgfgo_sgfdiag_comment_font_tl
		{\l__pgfgo_sgfdiag_font_tl} {\l__pgfgo_sgfdiag_comment_font_tl}
}
%CON height: SI LA CAJA ES MAS ALTA, QUEDA LO QUE ENTRA Y EL RESTO VA DESPUES DE LOS DIAGRAMAS.
\cs_new_protected:Npn \__pgfgo_sgfdiag_comments_cut: {
	\str_if_eq:VnF \l__pgfgo_sgfdiag_comment_height_tl {none} {
		\dim_compare:nNnT
			{\box_ht:N \l__pgfgo_sgfdiag_comments_box + \box_dp:N \l__pgfgo_sgfdiag_comments_box}
			> {\l__pgfgo_sgfdiag_comment_height_tl}
			{
				\vbox_set_split_to_ht:NNn \l__pgfgo_sgfdiag_top_box \l__pgfgo_sgfdiag_comments_box
					{\l__pgfgo_sgfdiag_comment_height_tl}
				\__pgfgo_sgfdiag_after_add:
				\box_set_eq:NN \l__pgfgo_sgfdiag_comments_box \l__pgfgo_sgfdiag_top_box
			}
	}
}
%AGREGA \l__pgfgo_sgfdiag_comments_box (SI NO ESTA VACIA) A LOS COMENTARIOS DE DESPUES, CON EL EPIGRAFE DEL
%DIAGRAMA COMO ENCABEZADO.
\cs_new_protected:Npn \__pgfgo_sgfdiag_after_add: {
	\dim_compare:nNnT
		{\box_ht:N \l__pgfgo_sgfdiag_comments_box + \box_dp:N \l__pgfgo_sgfdiag_comments_box} > {0pt}
		{
			\vbox_gset:Nn \g__pgfgo_sgfdiag_after_box {
				\vbox_unpack:N \g__pgfgo_sgfdiag_after_box
				\group_begin:
					\__pgfgo_sgfdiag_par_setup:N \l__pgfgo_sgfdiag_after_dim
					\__pgfgo_sgfdiag_comment_font: \bfseries \l__pgfgo_sgfdiag_caption_tl \par
				\group_end:
				\vbox_unpack:N \l__pgfgo_sgfdiag_comments_box
				\skip_vertical:N \smallskipamount
			}
		}
}
%DESPUES DE LOS DIAGRAMAS: LOS COMENTARIOS DE after O LOS QUE NO ENTRARON (SE PUEDEN CORTAR ENTRE PAGINAS).
\cs_new_protected:Npn \__pgfgo_sgfdiag_after_flush: {
	\box_if_empty:NF \g__pgfgo_sgfdiag_after_box {
		\par \skip_vertical:N \medskipamount
		\vbox_unpack:N \g__pgfgo_sgfdiag_after_box
		\box_gclear:N \g__pgfgo_sgfdiag_after_box
	}
}

%EL NUMERO QUE SE MOSTRO DE LA JUGADA #1 (EL DE LA PARTIDA SI NO SE DIBUJO).
\cs_new:Npn \__pgfgo_sgfdiag_shown:n #1 {
	\cs_if_exist:cTF {__pgfgo_sgf_shown_ #1 :} {\use:c {__pgfgo_sgf_shown_ #1 :}} {#1}
}

%separator ANTES DE CADA COMENTARIO MENOS EL PRIMERO.
\cs_new_protected:Npn \__pgfgo_sgfdiag_comment_separator: {
	\bool_if:NTF \l__pgfgo_sgfdiag_comment_first_bool
		{\bool_set_false:N \l__pgfgo_sgfdiag_comment_first_bool}
		{\l__pgfgo_sgfdiag_comment_separator_tl}
}

%LAS NOTAS "N at M" Y LOS COMENTARIOS DE LAS JUGADAS #1 A #2 (CON root, SI #1 ES 1, ANTES EL DE LA RAIZ).
\cs_new_protected:Npn \__pgfgo_sgfdiag_notes:nn #1#2 {
	\bool_if:nT {\l__pgfgo_sgfdiag_notes_bool && ! \seq_if_empty_p:N \g_pgfgo_move_notes_seq}
		{\__pgfgo_sgfdiag_below:nn {\l__pgfgo_sgfdiag_align_tl} {\pgfgomovenotes}}
	\bool_if:NT \l__pgfgo_sgfdiag_comments_bool {
		\__pgfgo_sgfdiag_comments_below:n {
			\bool_set_true:N \l__pgfgo_sgfdiag_comment_first_bool
			\bool_lazy_and:nnT {\l__pgfgo_sgfdiag_root_bool} {\int_compare_p:nNn {#1} = {1}}
				{\__pgfgo_sgf_if_comment:nT {0} {\__pgfgo_sgfdiag_comment_separator: \__pgfgo_sgf_comment_use:}}
			\int_step_inline:nnn {#1} {#2} {
				\__pgfgo_sgf_if_comment:nT {##1} {
					\__pgfgo_sgfdiag_comment_separator:
					\exp_args:Ne \__pgfgo_sgfdiag_comment_number:n {\__pgfgo_sgfdiag_shown:n {##1}}
					\__pgfgo_sgf_comment_use:
				}
			}
		}
	}
}

%EL DIAGRAMA #1, CON LAS JUGADAS #2 A #3. #4: EL NUMERO DEL NOMBRE DE SU FIGURA (0: SIN NOMBRE). EL EPIGRAFE
%DICE LOS NUMEROS DE LA PRIMERA Y LA ULTIMA JUGADA (LOS QUE SIGUEN A MN); SIN JUGADAS (#3 MENOR QUE #2), NADA.
\int_new:N \l__pgfgo_sgfdiag_first_number_int
\int_new:N \l__pgfgo_sgfdiag_last_number_int
\cs_new_protected:Npn \__pgfgo_sgfdiag_diagram:nnnn #1#2#3#4 {
	%LA VISTA QUE ABARCA LAS DE TODAS LAS JUGADAS DEL DIAGRAMA.
	\int_set:Nn \l_pgfgo_goban_sgf_view_from_int {#2}
	\int_set:Nn \l_pgfgo_goban_sgf_view_to_int {#3}
	\tl_set:Ne \l__pgfgo_sgfdiag_suffix_tl {\int_eval:n {#1}}
	\__pgfgo_sgf_move_number:Nn \l__pgfgo_sgfdiag_first_number_int {#2}
	\__pgfgo_sgf_move_number:Nn \l__pgfgo_sgfdiag_last_number_int {#3}
	\use:e {
		\exp_not:N \__pgfgo_sgfdiag_add:nnnn {#2} {#3}
			{
				\exp_not:n {
					\int_compare:nNnTF {#4} > {0}
						{\pgfgo_kernel_sgf_name:n {#4}}
						{\l__pgfgo_sgfdiag_title_tl \nobreakspace \int_eval:n {#1}}
				}
				\int_compare:nNnF {#3} < {#2} {
					\exp_not:N \nobreakspace
					(\int_use:N \l__pgfgo_sgfdiag_first_number_int--\int_use:N \l__pgfgo_sgfdiag_last_number_int)
				}
			}
			{
				\exp_not:n {
					\__pgfgo_sgfdiag_notes:nn {#2} {#3}
					\bool_lazy_and:nnT
						{\l__pgfgo_sgfdiag_result_bool}
						{\int_compare_p:nNn {#3} = {\l__pgfgo_sgfdiag_total_int}}
						{\__pgfgo_sgfdiag_result:}
				}
			}
	}
}

%UNA PARTIDA SIN JUGADAS ES UN DIAGRAMA DE SU POSICION, CON EL NOMBRE DE SU FIGURA (SI TIENE).
\cs_new_protected:Npn \__pgfgo_sgfdiag_position: {
	\tl_clear:N \l__pgfgo_sgfdiag_first_tl
	\tl_set:Nn \l_tmpa_tl {{1}{0}}
	\bool_lazy_and:nnT {\l__pgfgo_sgfdiag_figures_bool} {! \seq_if_empty_p:N \l_pgfgo_kernel_sgf_figures_seq}
		{\seq_get_left:NN \l_pgfgo_kernel_sgf_figures_seq \l_tmpa_tl}
	\use:e {\exp_not:N \__pgfgo_sgfdiag_diagram:nnnn {1} {1} {0} {\exp_after:wN \use_ii:nn \l_tmpa_tl}}
}

%EL DIAGRAMA #1 (JUGADAS #2 A #3, CON EL NOMBRE #4), SI TIENE JUGADAS DESDE from: EMPIEZA EN from O DESPUES.
%CON restart, SI NO EMPIEZA EN LA JUGADA 1, LA JUGADA #2 SE MUESTRA COMO restart/from (AUNQUE NO SE DIBUJE).
\tl_new:N \l__pgfgo_sgfdiag_first_tl
\cs_new_protected:Npn \__pgfgo_sgfdiag_range:nnnn #1#2#3#4 {
	\int_compare:nNnF {#3} < {\l__pgfgo_sgfdiag_from_int} {
		\bool_lazy_and:nnTF {\str_if_eq_p:Vn \l__pgfgo_sgfdiag_restart_tl {true}} {\int_compare_p:nNn {#2} > {1}}
			{
				\tl_set:Ne \l__pgfgo_sgfdiag_first_tl {
					\int_eval:n {
						\l__pgfgo_sgfdiag_restart_from_int + \int_max:nn {#2} {\l__pgfgo_sgfdiag_from_int} - (#2)
					}
				}
			}
			{\tl_clear:N \l__pgfgo_sgfdiag_first_tl}
		\__pgfgo_sgfdiag_diagram:nnnn {#1} {\int_max:nn {#2} {\l__pgfgo_sgfdiag_from_int}} {#3} {#4}
		\__pgfgo_sgfdiag_variations:nnn {#1} {#2} {#3}
	}
}

%LAS VARIANTES QUE NACEN EN LAS JUGADAS #2 A #3 DEL DIAGRAMA #1, CADA UNA CON SU LETRA (3a, 3b, ...). LAS
%VARIANTES DE UNA VARIANTE VAN DONDE VA LA VARIANTE DE LA QUE SALEN (NACEN EN LA MISMA JUGADA).
\int_new:N \l__pgfgo_sgfdiag_var_count_int
\cs_new_protected:Npn \__pgfgo_sgfdiag_variations:nnn #1#2#3 {
	\int_zero:N \l__pgfgo_sgfdiag_var_count_int
	\seq_map_inline:Nn \l__pgfgo_sgfdiag_var_seq {\__pgfgo_sgfdiag_var_if:nnnnnnnnn {#1} {#2} {#3} ##1}
}
%#4: CAMINO, #5: PROFUNDIDAD, #6: NACE, #7: EMPIEZA, #8: ULTIMA, #9: COMENTADA. SE DIBUJA SI ESTA EN LA
%LISTA, O SI commented O all LA INCLUYEN (HASTA LA PROFUNDIDAD depth).
\bool_new:N \l__pgfgo_sgfdiag_var_wanted_bool
%#1: CAMINO, #2: PROFUNDIDAD, #3: NACE, #4: COMENTADA.
\cs_new_protected:Npn \__pgfgo_sgfdiag_var_wanted:nnnn #1#2#3#4 {
	\seq_if_in:NnTF \l__pgfgo_sgfdiag_var_found_seq {#1}
		{\bool_set_true:N \l__pgfgo_sgfdiag_var_wanted_bool}
		{
			\bool_set:Nn \l__pgfgo_sgfdiag_var_wanted_bool {
				\int_compare_p:nNn {#2} < {\l__pgfgo_sgfdiag_var_depth_int + 1} &&
				! \int_compare_p:nNn {#3} < {\l__pgfgo_sgfdiag_var_from_int} &&
				(
					\l__pgfgo_sgfdiag_var_all_bool ||
					(\l__pgfgo_sgfdiag_var_commented_bool && \int_compare_p:nNn {#4} = {1})
				)
			}
		}
}
\cs_new_protected:Npn \__pgfgo_sgfdiag_var_if:nnnnnnnnn #1#2#3#4#5#6#7#8#9 {
	\int_compare:nT {#2 <= #6 <= #3} {
		\__pgfgo_sgfdiag_var_wanted:nnnn {#4} {#5} {#6} {#9}
		\bool_if:NT \l__pgfgo_sgfdiag_var_wanted_bool {
			\int_incr:N \l__pgfgo_sgfdiag_var_count_int
			\__pgfgo_sgfdiag_variation:nnnnn {\int_eval:n {#1} \int_to_alph:n {\l__pgfgo_sgfdiag_var_count_int}} {#4} {#7} {#7} {#8}
		}
	}
}

%EL DIAGRAMA #1 (3a) DE LA VARIANTE #2, QUE REEMPLAZA LA JUGADA #3 DE LA LINEA DE LA QUE SALE: SUS JUGADAS #4 A #5,
%NUMERADAS DESDE 1. SIN LA COPIA DE \sgfdiagrams (LA DE LA LINEA PRINCIPAL QUEDA COMO ESTABA).
\int_new:N \l__pgfgo_sgfdiag_var_move_int
\NewDocumentCommand \pgfgovariationmove {} {\int_use:N \l__pgfgo_sgfdiag_var_move_int}
\cs_new_protected:Npn \__pgfgo_sgfdiag_variation:nnnnn #1#2#3#4#5 {
	\group_begin:
		\bool_set_false:N \l__pgfgo_sgf_cache_bool
		\bool_set_false:N \l__pgfgo_sgfdiag_root_bool
		\bool_set_false:N \l__pgfgo_sgfdiag_result_bool
		\tl_set:Nn \l__pgfgo_sgfdiag_variation_tl {#2}
		\tl_set:Nn \l_pgfgo_goban_sgf_view_variation_tl {#2}
		\tl_set:Nn \l__pgfgo_sgfdiag_first_tl {1}
		\int_set:Nn \l__pgfgo_sgfdiag_var_move_int {#3}
		\int_set:Nn \l_pgfgo_goban_sgf_view_from_int {#4}
		\int_set:Nn \l_pgfgo_goban_sgf_view_to_int {#5}
		\tl_set:Ne \l__pgfgo_sgfdiag_suffix_tl {#1}
		\__pgfgo_sgfdiag_add:nnnn {#4} {#5}
			{\l__pgfgo_sgfdiag_title_tl \nobreakspace #1 \nobreakspace (\l__pgfgo_sgfdiag_var_title_tl)}
			{\__pgfgo_sgfdiag_notes:nn {#4} {#5}}
	\group_end:
}

%DEBAJO DEL ULTIMO DIAGRAMA: EL RESULTADO (RE) Y, SI EL ARCHIVO MARCA EL TERRITORIO (TB, TW), EL PUNTAJE DE
%CADA JUGADOR COMO EL DE \pgfgoscore (CON EL komi DE KM).
\tl_new:N \l__pgfgo_sgfdiag_re_tl
\cs_new_protected:Npn \__pgfgo_sgfdiag_result: {
	\tl_set:Ne \l__pgfgo_sgfdiag_re_tl {\exp_args:NV \pgfgo_kernel_sgf_info:nn \l__pgfgo_sgfdiag_file_tl {RE}}
	\bool_lazy_or:nnT
		{! \tl_if_blank_p:V \l__pgfgo_sgfdiag_re_tl}
		{! \prop_if_empty_p:N \g_pgfgo_territory_prop}
		{
			\__pgfgo_sgfdiag_below:nn {\l__pgfgo_sgfdiag_align_tl} {
				\l__pgfgo_sgfdiag_result_title_tl :~
				\tl_if_blank:VF \l__pgfgo_sgfdiag_re_tl {
					\str_if_eq:VnTF \l__pgfgo_sgfdiag_result_format_tl {raw}
						{\tl_use:N \l__pgfgo_sgfdiag_re_tl}
						{\exp_args:NV \__pgfgo_sgfdiag_result_text:n \l__pgfgo_sgfdiag_re_tl}
				}
				\prop_if_empty:NF \g_pgfgo_territory_prop {
					\tl_if_blank:VTF \l__pgfgo_sgfdiag_re_tl
						{\__pgfgo_sgfdiag_score:n {}}
						{\__pgfgo_sgfdiag_score:n {~(} )}
				}
			}
		}
}
\cs_new_protected:Npn \__pgfgo_sgfdiag_score:n #1 {
	#1
	\l__pgfgo_sgfdiag_black_tl \nobreakspace \pgfgoscore{black},~
	\l__pgfgo_sgfdiag_white_tl \nobreakspace \__pgfgo_sgfdiag_white_score:V \l__pgfgo_sgfdiag_komi_tl
}
\cs_new_protected:Npn \__pgfgo_sgfdiag_white_score:n #1 {\pgfgoscore[komi = {#1}]{white}}
\cs_generate_variant:Nn \__pgfgo_sgfdiag_white_score:n {V}

%EL RESULTADO #1 (RE) EN PALABRAS, CON LOS TEXTOS DEL IDIOMA (VER pgf-go-lang.sty): 0 O Draw, Void, ?, Y B+
%O W+ SEGUIDO DE NADA, DE LA DIFERENCIA, DE R (Resign), T (Time) O F (Forfeit). OTRA COSA SE ESCRIBE COMO ESTA.
%EN LOS TEXTOS, \pgfgowinner ES EL NOMBRE DEL GANADOR (black name O white name) Y \pgfgopoints LA DIFERENCIA.
\tl_new:N \l__pgfgo_sgfdiag_winner_tl
\tl_new:N \l__pgfgo_sgfdiag_points_tl
\seq_new:N \l__pgfgo_sgfdiag_re_seq
\NewDocumentCommand \pgfgowinner {} {\l__pgfgo_sgfdiag_winner_tl}
\NewDocumentCommand \pgfgopoints {} {\l__pgfgo_sgfdiag_points_tl}
\cs_new_protected:Npn \__pgfgo_sgfdiag_result_text:n #1 {
	\str_case_e:nnF {\str_lowercase:n {#1}} {
		{0}				{\pgfgo_text:n {draw}}
		{draw}		{\pgfgo_text:n {draw}}
		{void}		{\pgfgo_text:n {void}}
		{?}				{\pgfgo_text:n {unknown~result}}
	}{
		\regex_extract_once:nnNTF {\A([BbWw])\+(.*)\Z} {#1} \l__pgfgo_sgfdiag_re_seq
			{
				\str_if_eq:eeTF {\str_uppercase:f {\seq_item:Nn \l__pgfgo_sgfdiag_re_seq {2}}} {B}
					{\tl_set_eq:NN \l__pgfgo_sgfdiag_winner_tl \l__pgfgo_sgfdiag_black_tl}
					{\tl_set_eq:NN \l__pgfgo_sgfdiag_winner_tl \l__pgfgo_sgfdiag_white_tl}
				\tl_set:Ne \l__pgfgo_sgfdiag_points_tl {\seq_item:Nn \l__pgfgo_sgfdiag_re_seq {3}}
				\str_case_e:nnF {\str_lowercase:f {\l__pgfgo_sgfdiag_points_tl}} {
					{}				{\pgfgo_text:n {win}}
					{r}				{\pgfgo_text:n {win~by~resignation}}
					{resign}	{\pgfgo_text:n {win~by~resignation}}
					{t}				{\pgfgo_text:n {win~on~time}}
					{time}		{\pgfgo_text:n {win~on~time}}
					{f}				{\pgfgo_text:n {win~by~forfeit}}
					{forfeit}	{\pgfgo_text:n {win~by~forfeit}}
				}{
					\regex_match:nVTF {\A\d+(\.\d*)?\Z} \l__pgfgo_sgfdiag_points_tl
						{\pgfgo_text:n {win~by~points}}
						{#1}
				}
			}
			{#1}
	}
}

%UN DIAGRAMA POR FIGURA (FG): DESDE DONDE EMPIEZA HASTA LA JUGADA ANTERIOR A LA FIGURA SIGUIENTE. SI LA
%PRIMERA FIGURA NO EMPIEZA EN LA JUGADA 1, LAS JUGADAS ANTERIORES SON UN DIAGRAMA MAS.
\int_new:N \l__pgfgo_sgfdiag_count_int
\seq_new:N \l__pgfgo_sgfdiag_figures_seq
\cs_new_protected:Npn \__pgfgo_sgfdiag_figures: {
	\seq_set_eq:NN \l__pgfgo_sgfdiag_figures_seq \l_pgfgo_kernel_sgf_figures_seq
	\seq_get_left:NN \l__pgfgo_sgfdiag_figures_seq \l_tmpa_tl
	\int_compare:nNnT {\exp_after:wN \use_i:nn \l_tmpa_tl} > {1}
		{\seq_put_left:Nn \l__pgfgo_sgfdiag_figures_seq {{1}{0}}}
	\seq_put_right:Ne \l__pgfgo_sgfdiag_figures_seq {{\int_eval:n {\l__pgfgo_sgfdiag_last_int + 1}}{0}}
	\int_zero:N \l__pgfgo_sgfdiag_count_int
	\int_step_inline:nn {\seq_count:N \l__pgfgo_sgfdiag_figures_seq - 1} {
		\use:e {
			\exp_not:N \__pgfgo_sgfdiag_figure:nnnn
				\seq_item:Nn \l__pgfgo_sgfdiag_figures_seq {##1}
				\seq_item:Nn \l__pgfgo_sgfdiag_figures_seq {##1 + 1}
		}
	}
}
%#1#2: {JUGADA}{NOMBRE} DE LA FIGURA, #3#4: LOS DE LA SIGUIENTE.
\cs_new_protected:Npn \__pgfgo_sgfdiag_figure:nnnn #1#2#3#4 {
	\int_compare:nNnT {#1} < {#3} {
		\int_compare:nNnF {#1} > {\l__pgfgo_sgfdiag_last_int} {
			\int_incr:N \l__pgfgo_sgfdiag_count_int
			\__pgfgo_sgfdiag_range:nnnn {\l__pgfgo_sgfdiag_count_int} {#1}
				{\int_min:nn {#3 - 1} {\l__pgfgo_sgfdiag_last_int}} {#2}
		}
	}
}

%UN DIAGRAMA CADA step JUGADAS: EL DIAGRAMA n TIENE TANTAS COMO EL ELEMENTO n DE step (O EL ULTIMO).
\int_new:N \l__pgfgo_sgfdiag_start_int
\int_new:N \l__pgfgo_sgfdiag_length_int
\cs_new_protected:Npn \__pgfgo_sgfdiag_steps: {
	\clist_if_empty:NT \l__pgfgo_sgfdiag_step_clist {\clist_set:Nn \l__pgfgo_sgfdiag_step_clist {50}}
	\int_zero:N \l__pgfgo_sgfdiag_count_int
	\int_set:Nn \l__pgfgo_sgfdiag_start_int {1}
	\int_until_do:nNnn {\l__pgfgo_sgfdiag_start_int} > {\l__pgfgo_sgfdiag_last_int} {
		\int_incr:N \l__pgfgo_sgfdiag_count_int
		\int_set:Nn \l__pgfgo_sgfdiag_length_int {
			\int_max:nn {1} {
				\clist_item:Nn \l__pgfgo_sgfdiag_step_clist
					{\int_min:nn {\l__pgfgo_sgfdiag_count_int} {\clist_count:N \l__pgfgo_sgfdiag_step_clist}}
			}
		}
		\use:e {
			\exp_not:N \__pgfgo_sgfdiag_range:nnnn
				{\int_use:N \l__pgfgo_sgfdiag_count_int}
				{\int_use:N \l__pgfgo_sgfdiag_start_int}
				{\int_min:nn {\l__pgfgo_sgfdiag_start_int + \l__pgfgo_sgfdiag_length_int - 1} {\l__pgfgo_sgfdiag_last_int}}
				{0}
		}
		\int_add:Nn \l__pgfgo_sgfdiag_start_int {\l__pgfgo_sgfdiag_length_int}
	}
}

\cs_new_protected:Npn \pgfgo_sgfdiagrams:nn #1#2 {
	\group_begin:
		\pgfgo_sgf_use_name:n {#2}
		\keys_set:nn {pgfgo / sgf~diagrams} {#1}
		\bool_set_eq:NN \l__pgfgo_sgf_annotations_bool \l__pgfgo_sgfdiag_annotations_bool
		\bool_set_eq:NN \l__pgfgo_sgf_chat_bool \l__pgfgo_sgfdiag_chat_bool
		%CADA DIAGRAMA SIGUE LA PARTIDA DESDE EL ANTERIOR (VER \__pgfgo_sgf_play:).
		\__pgfgo_sgf_cache_begin:
		\__pgfgo_sgfdiag_begin:Nn \l__pgfgo_sgfdiag_layout_tl {#2}
		\tl_clear:N \l__pgfgo_sgf_extent_tl
		\exp_args:NnV \pgfgo_kernel_sgf_read:nn {#2} \l__pgfgo_sgfdiag_variation_tl
		\__pgfgo_sgf_board:N \l__pgfgo_sgfdiag_board_tl
		\tl_set_eq:NN \l__pgfgo_sgfdiag_komi_tl \l_pgfgo_kernel_sgf_komi_tl
		\__pgfgo_sgfdiag_var_setup:n {#2}
		%CON true, CADA DIAGRAMA SE NUMERA CON \l__pgfgo_sgfdiag_first_tl: \sgf NO REINICIA.
		\tl_set:Ne \l__pgfgo_sgfdiag_sgf_restart_tl
			{\str_if_eq:VnTF \l__pgfgo_sgfdiag_restart_tl {auto} {auto} {false}}
		\tl_set:Ne \l__pgfgo_sgfdiag_window_tl {
			\tl_if_empty:NTF \l__pgfgo_sgfdiag_partial_tl {
				\bool_if:NT \l__pgfgo_sgfdiag_partial_bool {partial = auto,}
				\bool_if:NT \l__pgfgo_sgfdiag_view_bool {sgf~view = {\exp_not:n {#2}}}
			}{
				partial = {\exp_not:V \l__pgfgo_sgfdiag_partial_tl}
			}
		}
		\tl_set_eq:NN \l_pgfgo_goban_sgf_view_variation_tl \l__pgfgo_sgfdiag_variation_tl
		\__pgfgo_sgf_count_moves:Nn \l__pgfgo_sgfdiag_total_int {\c_max_int}
		\int_set:Nn \l__pgfgo_sgfdiag_last_int {
			\int_compare:nNnTF {\l__pgfgo_sgfdiag_to_int} < {0}
				{\l__pgfgo_sgfdiag_total_int}
				{\int_min:nn {\l__pgfgo_sgfdiag_to_int} {\l__pgfgo_sgfdiag_total_int}}
		}
		\bool_if:NT \l__pgfgo_sgfdiag_partial_bool {\__pgfgo_sgfdiag_extent:n {#2}}
		\bool_lazy_and:nnTF {\l__pgfgo_sgfdiag_figures_bool} {! \seq_if_empty_p:N \l_pgfgo_kernel_sgf_figures_seq}
			{\__pgfgo_sgfdiag_figures:}
			{\__pgfgo_sgfdiag_steps:}
		\int_compare:nNnT {\l__pgfgo_sgfdiag_total_int} = {0} {\__pgfgo_sgfdiag_position:}
		\pgfgo_layout_end:
		\__pgfgo_sgfdiag_after_flush:
	\group_end:
}

%LAS VARIANTES DEL ARCHIVO #1 QUE PUEDEN DIBUJARSE: LAS QUE SE APARTAN DE LA LINEA QUE SE DIBUJA (LA DE
%variation). LOS CAMINOS DE LA LISTA,
%COMO NUMEROS SIN LOS 1 DEL FINAL (2.3.1 ES LA MISMA LINEA QUE 2.3), QUEDAN EN \l__pgfgo_sgfdiag_var_found_seq.
%UN CAMINO QUE NO ES UNA VARIANTE DA UN AVISO.
\msg_new:nnn {pgfgo} {sgf-no-variation}
	{'#1'~has~no~variation~'#2':~it~is~not~drawn.}
\seq_new:N \l__pgfgo_sgfdiag_var_seq
\seq_new:N \l__pgfgo_sgfdiag_var_found_seq
\cs_new_protected:Npn \__pgfgo_sgfdiag_var_setup:n #1 {
	\seq_clear:N \l__pgfgo_sgfdiag_var_seq
	\seq_clear:N \l__pgfgo_sgfdiag_var_found_seq
	\bool_lazy_or:nnT
		{\l__pgfgo_sgfdiag_var_commented_bool || \l__pgfgo_sgfdiag_var_all_bool}
		{! \seq_if_empty_p:N \l__pgfgo_sgfdiag_var_paths_seq}
		{
			\exp_args:NnV \pgfgo_kernel_sgf_branches:nn {#1} \l__pgfgo_sgfdiag_variation_tl
			\seq_set_eq:NN \l__pgfgo_sgfdiag_var_seq \l_pgfgo_kernel_sgf_branches_seq
			\seq_map_inline:Nn \l__pgfgo_sgfdiag_var_paths_seq {
				\pgfgo_kernel_sgf_path:nn {#1} {##1}
				\seq_put_right:NV \l__pgfgo_sgfdiag_var_found_seq \l_pgfgo_kernel_sgf_path_tl
				\bool_set_false:N \l_tmpa_bool
				\seq_map_inline:Nn \l__pgfgo_sgfdiag_var_seq {
					\str_if_eq:eeT {\use_i:nnnnnn ####1} {\l_pgfgo_kernel_sgf_path_tl}
						{\bool_set_true:N \l_tmpa_bool \seq_map_break:}
				}
				\bool_if:NF \l_tmpa_bool {\msg_warning:nnnn {pgfgo} {sgf-no-variation} {#1} {##1}}
			}
			%LA LECTURA DE LA LINEA QUE SE DIBUJA QUEDA COMO ESTABA.
			\exp_args:NnV \pgfgo_kernel_sgf_read:nn {#1} \l__pgfgo_sgfdiag_variation_tl
		}
}

%partial = auto: LA PARTE VISIBLE DE LA LINEA QUE SE DIBUJA Y DE LAS VARIANTES QUE SE DIBUJAN (LAS QUE
%NACEN HASTA LA ULTIMA JUGADA), DEL ARCHIVO #1.
\tl_new:N \l__pgfgo_sgfdiag_extent_tl
\cs_new_protected:Npn \__pgfgo_sgfdiag_extent:n #1 {
	\tl_set_eq:NN \l__pgfgo_sgfdiag_extent_tl \l__pgfgo_sgfdiag_variation_tl
	\seq_map_inline:Nn \l__pgfgo_sgfdiag_var_seq {\__pgfgo_sgfdiag_extent:nnnnnn ##1}
	\__pgfgo_sgf_extent:nV {#1} \l__pgfgo_sgfdiag_extent_tl
}
\cs_new_protected:Npn \__pgfgo_sgfdiag_extent:nnnnnn #1#2#3#4#5#6 {
	\int_compare:nNnF {#3} > {\l__pgfgo_sgfdiag_last_int} {
		\__pgfgo_sgfdiag_var_wanted:nnnn {#1} {#2} {#3} {#6}
		\bool_if:NT \l__pgfgo_sgfdiag_var_wanted_bool {\tl_put_right:Nn \l__pgfgo_sgfdiag_extent_tl {; #1}}
	}
}

\NewDocumentCommand{\sgfdiagrams}{O{}m}{
	\__pgfgo_sgf_if_kernel:n {\pgfgo_sgfdiagrams:nn {#1} {#2}}
}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%---------------------------------------PROBLEMAS-----------------------------------------------%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%\sgfproblem[<opciones>]{<archivo>} DIBUJA UN PROBLEMA (TSUMEGO): EL ENUNCIADO (LA POSICION INICIAL CON
%SUS MARCAS, QUIEN JUEGA Y EL COMENTARIO DE LA RAIZ) Y UN DIAGRAMA POR CADA LINEA DEL ARBOL (CADA VARIANTE
%DE LA SOLUCION), NUMERADA DESDE 1, CON SUS NOTAS Y SUS COMENTARIOS. SE USA FUERA DE goban. LOS DIAGRAMAS
%SE DIBUJAN COMO LOS DE \sgfdiagrams.

\bool_new:N \l__pgfgo_sgfprob_statement_bool
\bool_new:N \l__pgfgo_sgfprob_alone_bool
\tl_new:N \l__pgfgo_sgfprob_layout_tl
\bool_new:N \l__pgfgo_sgfprob_solutions_bool
\bool_new:N \l__pgfgo_sgfprob_view_bool
\bool_new:N \l__pgfgo_sgfprob_partial_bool
\tl_new:N \l__pgfgo_sgfprob_partial_tl
\int_new:N \l__pgfgo_sgfprob_last_int
\tl_new:N \l__pgfgo_sgfprob_title_tl
\tl_new:N \l__pgfgo_sgfprob_goban_tl
\tl_new:N \l__pgfgo_sgfprob_font_tl
\tl_new:N \l__pgfgo_sgfprob_caption_min_tl
\bool_new:N \l__pgfgo_sgfprob_notes_bool
\bool_new:N \l__pgfgo_sgfprob_comments_bool
\tl_new:N \l__pgfgo_sgfprob_comment_font_tl
\tl_new:N \l__pgfgo_sgfprob_comment_align_tl
\tl_new:N \l__pgfgo_sgfprob_comment_separator_tl
\tl_new:N \l__pgfgo_sgfprob_comment_position_tl
\tl_new:N \l__pgfgo_sgfprob_comment_width_tl
\dim_new:N \l__pgfgo_sgfprob_comment_sep_dim
\tl_new:N \l__pgfgo_sgfprob_comment_height_tl
\cs_new:Npn \__pgfgo_sgfprob_comment_number:n #1 {}
\tl_new:N \l__pgfgo_sgfprob_variation_title_tl
\tl_new:N \l__pgfgo_sgfprob_black_tl
\tl_new:N \l__pgfgo_sgfprob_white_tl
\tl_new:N \l__pgfgo_sgfprob_player_tl
%LAS PARTIDAS DEL ARCHIVO (game = {1:20, 25}: UNA COLECCION DE PROBLEMAS), QUIEN JUEGA (to play) Y EL
%COMIENZO DEL EPIGRAFE DE CADA PROBLEMA ("Problem 3").
\seq_new:N \l__pgfgo_sgfprob_games_seq
\tl_new:N \l__pgfgo_sgfprob_to_play_tl
\tl_new:N \l__pgfgo_sgfprob_head_tl
%verdict: SI CADA SOLUCION ES CORRECTA O NO (\l__pgfgo_sgfprob_verdict_tl: correct, wrong O NADA).
\bool_new:N \l__pgfgo_sgfprob_verdict_bool
\tl_new:N \l__pgfgo_sgfprob_verdict_tl
\tl_new:N \l__pgfgo_sgfprob_position_tl
\tl_new:N \l__pgfgo_sgfprob_moves_tl
\bool_new:N \l__pgfgo_sgfprob_right_bool
\seq_new:N \l__pgfgo_sgfprob_paths_seq
\bool_new:N \l__pgfgo_sgfprob_links_bool

\keys_define:nn {pgfgo / sgf~problem} {
	%alone: EL ENUNCIADO VA SOLO EN SU FILA, Y LAS VARIANTES DEBAJO.
	statement						.choices:nn	= {true, false, alone} {
		\bool_set:Nn \l__pgfgo_sgfprob_statement_bool {! \str_if_eq_p:Vn \l_keys_choice_tl {false}}
		\bool_set:Nn \l__pgfgo_sgfprob_alone_bool {\str_if_eq_p:Vn \l_keys_choice_tl {alone}}
	},
	statement						.default:n	= {true},
	statement						.initial:n	= {true},
	solutions						.bool_set:N	= \l__pgfgo_sgfprob_solutions_bool,
	solutions						.default:n	= {true},
	solutions						.initial:n	= {true},
	%EPIGRAFE DEL ENUNCIADO, ANTES DE QUIEN JUEGA ("Problem 3: Black to play").
	title								.tl_set:N		= \l__pgfgo_sgfprob_title_tl,
	variation~title			.tl_set:N		= \l__pgfgo_sgfprob_variation_title_tl,
	variation~title			.initial:n	= {\pgfgo_text:n {variation}},
	black~to~play				.tl_set:N		= \l__pgfgo_sgfprob_black_tl,
	black~to~play				.initial:n	= {\pgfgo_text:n {black~to~play}},
	white~to~play				.tl_set:N		= \l__pgfgo_sgfprob_white_tl,
	white~to~play				.initial:n	= {\pgfgo_text:n {white~to~play}},
	%COMO EN \sgfdiagrams (PERO CON LOS COMENTARIOS: ASI SE VE CUALES LINEAS SON CORRECTAS).
	goban								.tl_set:N		= \l__pgfgo_sgfprob_goban_tl,
	%EL ENUNCIADO SE LLAMA name, Y CADA SOLUCION name SEGUIDO DE SU NUMERO. CON VARIAS PARTIDAS, name Y LA
	%PARTIDA (problema3), Y name, LA PARTIDA, - Y EL NUMERO (problema3-1).
	name								.tl_set:N		= \l__pgfgo_sgfprob_name_tl,
	caption							.code:n			= {\keys_set:nn {pgfgo / sgf~problem / caption} {#1}},
	notes								.bool_set:N	= \l__pgfgo_sgfprob_notes_bool,
	notes								.default:n	= {true},
	notes								.initial:n	= {true},
	comments						.code:n			= {\keys_set:nn {pgfgo / sgf~problem / comments} {#1}},
	comments						.default:n	= {true},
	annotations					.bool_set:N	= \l__pgfgo_sgfprob_annotations_bool,
	annotations					.default:n	= {true},
	chat								.bool_set:N	= \l__pgfgo_sgfprob_chat_bool,
	chat								.default:n	= {true},
	%UNA PARTIDA, O VARIAS ({1:20, 25}): PRIMERO TODOS LOS ENUNCIADOS Y DESPUES LAS SOLUCIONES.
	game								.code:n			= {\__pgfgo_sgfprob_games:n {#1}},
	%auto: PL O EL COLOR DE LA PRIMERA JUGADA. none: EL EPIGRAFE NO DICE QUIEN JUEGA.
	to~play							.choices:nn	= {auto, black, white, none}
		{\tl_set_eq:NN \l__pgfgo_sgfprob_to_play_tl \l_keys_choice_tl},
	to~play							.initial:n	= {auto},
	%EL EPIGRAFE DE CADA SOLUCION DICE SI ES CORRECTA, SEGUN SUS ANOTACIONES (VER \__pgfgo_sgfprob_verdict:n).
	verdict							.bool_set:N	= \l__pgfgo_sgfprob_verdict_bool,
	verdict							.default:n	= {true},
	verdict							.initial:n	= {false},
	%LA VISTA DEL ARCHIVO (VW). SI NO HAY, CON partial = auto SE MUESTRA SOLO LA PARTE DEL TABLERO QUE USA EL
	%PROBLEMA.
	view								.bool_set:N	= \l__pgfgo_sgfprob_view_bool,
	view								.default:n	= {true},
	view								.initial:n	= {true},
	partial							.code:n			= {\__pgfgo_sgf_partial:NNn \l__pgfgo_sgfprob_partial_bool \l__pgfgo_sgfprob_partial_tl {#1}},
	partial							.initial:n	= {auto},
	layout							.code:n			= {\tl_put_right:Nn \l__pgfgo_sgfprob_layout_tl {, #1}},
	%CON hyperref: EL EPIGRAFE DEL ENUNCIADO LLEVA A SU PRIMERA SOLUCION, Y EL DE CADA SOLUCION AL ENUNCIADO.
	links								.bool_set:N	= \l__pgfgo_sgfprob_links_bool,
	links								.default:n	= {true},
	links								.initial:n	= {false},
}
%COMO EN \sgfdiagrams (SIN root: EL COMENTARIO DE LA RAIZ VA CON EL ENUNCIADO).
\keys_define:nn {pgfgo / sgf~problem / comments} {
	true								.code:n			= {\bool_set_true:N \l__pgfgo_sgfprob_comments_bool},
	false								.code:n			= {\bool_set_false:N \l__pgfgo_sgfprob_comments_bool},
	font								.tl_set:N		= \l__pgfgo_sgfprob_comment_font_tl,
	align								.code:n			= {\__pgfgo_sgfdiag_comment_align:Nn \l__pgfgo_sgfprob_comment_align_tl {#1}},
	align								.initial:n	= {left},
	number							.code:n			= {\cs_set:Npn \__pgfgo_sgfprob_comment_number:n ##1 {#1}},
	number							.initial:n	= {\textbf{#1}:~},
	separator						.tl_set:N		= \l__pgfgo_sgfprob_comment_separator_tl,
	separator						.initial:n	= {\par},
	position						.choices:nn	= {below, right, left, after}
		{\tl_set_eq:NN \l__pgfgo_sgfprob_comment_position_tl \l_keys_choice_tl},
	height							.tl_set:N		= \l__pgfgo_sgfprob_comment_height_tl,
	height							.initial:n	= {none},
	position						.initial:n	= {below},
	width							.tl_set:N		= \l__pgfgo_sgfprob_comment_width_tl,
	width							.initial:n	= {auto},
	sep								.dim_set:N	= \l__pgfgo_sgfprob_comment_sep_dim,
	sep								.initial:n	= {1em},
}
\bool_set_true:N \l__pgfgo_sgfprob_comments_bool
\keys_define:nn {pgfgo / sgf~problem / caption} {
	font								.tl_set:N		= \l__pgfgo_sgfprob_font_tl,
	font								.initial:n	= {\small},
	min~width					.tl_set:N		= \l__pgfgo_sgfprob_caption_min_tl,
	min~width					.initial:n	= {8em},
}
\keys_define:nn {pgfgo} {
	sgf~problem					.code:n			= {\keys_set:nn {pgfgo / sgf~problem} {#1}}
}

%QUIEN JUEGA: EL PL DEL PRINCIPIO O, SI NO ESTA, EL COLOR DE LA PRIMERA JUGADA.
\cs_new_protected:Npn \__pgfgo_sgfprob_player:nnn #1#2#3 {
	\str_case:nnT {#1} {
		{player}	{\tl_set:Nn \l__pgfgo_sgfprob_player_tl {#2}}
		{black}		{\tl_set:Nn \l__pgfgo_sgfprob_player_tl {black}}
		{white}		{\tl_set:Nn \l__pgfgo_sgfprob_player_tl {white}}
	}{
		\seq_map_break:
	}
}

%LA PARTE VISIBLE ES LA MISMA EN TODOS LOS DIAGRAMAS: LA VISTA INICIAL DEL ARCHIVO #1, O LA DE partial = auto.
\cs_new_protected:Npn \__pgfgo_sgfprob_window:n #1 {
	\tl_clear:N \l__pgfgo_sgfdiag_window_tl
	\int_zero:N \l_pgfgo_goban_sgf_view_from_int
	\int_zero:N \l_pgfgo_goban_sgf_view_to_int
	\tl_clear:N \l_pgfgo_goban_sgf_view_variation_tl
	\tl_if_empty:NTF \l__pgfgo_sgfprob_partial_tl {
		\bool_lazy_and:nnTF {\l__pgfgo_sgfprob_view_bool} {! \tl_if_empty_p:N \l_pgfgo_kernel_sgf_view_tl}
			{\tl_set:Nn \l__pgfgo_sgfdiag_window_tl {sgf~view = {#1}}}
			{\bool_if:NT \l__pgfgo_sgfprob_partial_bool {\tl_set:Nn \l__pgfgo_sgfdiag_window_tl {partial = auto}}}
	}{
		\tl_set:Ne \l__pgfgo_sgfdiag_window_tl {partial = {\exp_not:V \l__pgfgo_sgfprob_partial_tl}}
	}
}

%LAS PARTIDAS DE game: NUMEROS Y RANGOS (3:7, COMO LOS DE LAS COORDENADAS), SEPARADOS POR COMAS. LOS : DEL
%DOCUMENTO NO SON LETRAS: SE SEPARA CON \c_colon_str.
\cs_generate_variant:Nn \seq_set_split:Nnn {NV}
\cs_new_protected:Npn \__pgfgo_sgfprob_games:n #1 {
	\seq_clear:N \l__pgfgo_sgfprob_games_seq
	\clist_map_inline:nn {#1} {
		\seq_set_split:NVn \l_tmpa_seq \c_colon_str {##1}
		\int_step_inline:nnn {\seq_item:Nn \l_tmpa_seq {1}} {\seq_item:Nn \l_tmpa_seq {-1}}
			{\seq_put_right:Nn \l__pgfgo_sgfprob_games_seq {####1}}
	}
	\seq_get_left:NNT \l__pgfgo_sgfprob_games_seq \l_tmpa_tl
		{\int_set:Nn \l_pgfgo_kernel_sgf_game_int {\l_tmpa_tl}}
}

%SACA DE LA LISTA LAS PARTIDAS QUE EL ARCHIVO #1 NO TIENE, CON UN SOLO AVISO. SI NO QUEDA NINGUNA, LA
%PRIMERA (COMO CON game EN \sgf). SIN EL ARCHIVO NO SE TOCA (EL AVISO ES EL DE LA LECTURA).
\seq_new:N \l__pgfgo_sgfprob_existing_seq
\int_new:N \l__pgfgo_sgfprob_missing_int
\msg_new:nnn {pgfgo} {sgf-games}
	{'#1'~has~#2~game(s);~the~#3~game(s)~after~#2~are~left~out.}
\cs_new_protected:Npn \__pgfgo_sgfprob_existing_games:n #1 {
	\pgfgo_kernel_sgf_games:n {#1}
	\int_compare:nNnT {\l_pgfgo_kernel_sgf_games_int} > {0} {
		\seq_clear:N \l__pgfgo_sgfprob_existing_seq
		\int_zero:N \l__pgfgo_sgfprob_missing_int
		\seq_map_inline:Nn \l__pgfgo_sgfprob_games_seq {
			\int_compare:nNnTF {##1} > {\l_pgfgo_kernel_sgf_games_int}
				{\int_incr:N \l__pgfgo_sgfprob_missing_int}
				{\seq_put_right:Nn \l__pgfgo_sgfprob_existing_seq {##1}}
		}
		\int_compare:nNnT {\l__pgfgo_sgfprob_missing_int} > {0} {
			\use:e {
				\msg_warning:nnnnn {pgfgo} {sgf-games} {\exp_not:n {#1}}
					{\int_use:N \l_pgfgo_kernel_sgf_games_int} {\int_use:N \l__pgfgo_sgfprob_missing_int}
			}
			\seq_if_empty:NT \l__pgfgo_sgfprob_existing_seq
				{\seq_put_right:Nn \l__pgfgo_sgfprob_existing_seq {1}}
			\seq_set_eq:NN \l__pgfgo_sgfprob_games_seq \l__pgfgo_sgfprob_existing_seq
		}
	}
}

\cs_generate_variant:Nn \str_case:nnF {V}
%LEE EL PROBLEMA DEL ARCHIVO #1 (LA PARTIDA \l_pgfgo_kernel_sgf_game_int): SUS LINEAS, SU TAMANO, QUIEN JUEGA Y
%LA PARTE VISIBLE.
\cs_new_protected:Npn \__pgfgo_sgfprob_prepare:n #1 {
	\__pgfgo_sgf_extent:n {#1}
	\seq_set_eq:NN \l__pgfgo_sgfprob_paths_seq \l_pgfgo_kernel_sgf_paths_seq
	\pgfgo_kernel_sgf_read:n {#1}
	\__pgfgo_sgf_board:N \l__pgfgo_sgfdiag_board_tl
	\tl_clear:N \l__pgfgo_sgfprob_player_tl
	\str_case:VnF \l__pgfgo_sgfprob_to_play_tl {
		{auto}	{\seq_map_inline:Nn \l_pgfgo_kernel_sgf_moves_seq {\__pgfgo_sgfprob_player:nnn ##1}}
		{none}	{}
	}{
		\tl_set_eq:NN \l__pgfgo_sgfprob_player_tl \l__pgfgo_sgfprob_to_play_tl
	}
	\__pgfgo_sgfprob_window:n {#1}
}

%EL COMIENZO DEL EPIGRAFE DEL PROBLEMA #1: title; CON VARIAS PARTIDAS, title (O "Problem") Y EL NUMERO.
%CON VARIAS PARTIDAS, \l__pgfgo_sgfprob_game_tl ES #1 (PARA LOS NOMBRES DE name).
\tl_new:N \l__pgfgo_sgfprob_game_tl
\cs_new_protected:Npn \__pgfgo_sgfprob_head:n #1 {
	\tl_set:Ne \l__pgfgo_sgfprob_game_tl
		{\int_compare:nNnT {\seq_count:N \l__pgfgo_sgfprob_games_seq} > {1} {#1}}
	\int_compare:nNnTF {\seq_count:N \l__pgfgo_sgfprob_games_seq} > {1}
		{
			\tl_set:Ne \l__pgfgo_sgfprob_head_tl {
				\tl_if_empty:NTF \l__pgfgo_sgfprob_title_tl
					{\exp_not:n {\pgfgo_text:n {problem}}} {\exp_not:V \l__pgfgo_sgfprob_title_tl}
				\exp_not:N \nobreakspace #1
			}
		}
		{\tl_set_eq:NN \l__pgfgo_sgfprob_head_tl \l__pgfgo_sgfprob_title_tl}
}

%LOS ENLACES (links). EL DESTINO DEL ENUNCIADO Y EL DE LA PRIMERA SOLUCION DE CADA PROBLEMA SE LLAMAN
%pgfgo.<HASH> (DEL ARCHIVO, LA PARTIDA Y statement O solution), Y SE ANOTAN EN EL .aux COMO ETIQUETAS
%(pgfgo@<HASH>): UN ENLACE SOLO SE PONE SI SU DESTINO ESTABA EN LA COMPILACION ANTERIOR, Y SI ALGUNO ES NUEVO
%LaTeX AVISA QUE LAS ETIQUETAS CAMBIARON. CADA DESTINO SE PONE UNA SOLA VEZ.
\msg_new:nnn {pgfgo} {sgf-links} {sgf~problem/links~needs~hyperref.}
\bool_new:N \g__pgfgo_sgfprob_links_warned_bool
\prop_new:N \g__pgfgo_sgfprob_targets_prop
\tl_new:N \l__pgfgo_sgfprob_target_tl
\tl_new:N \l__pgfgo_sgfprob_link_tl
\cs_generate_variant:Nn \str_mdfive_hash:n {e}
\cs_new:Npn \__pgfgo_sgfprob_id:n #1 {
	\str_mdfive_hash:e {\tl_to_str:N \l__pgfgo_sgfdiag_file_tl / \int_use:N \l_pgfgo_kernel_sgf_game_int / #1}
}
\prg_new_protected_conditional:Npnn \__pgfgo_sgfprob_if_links: {T, TF} {
	\bool_if:NTF \l__pgfgo_sgfprob_links_bool
		{
			\cs_if_exist:NTF \hyperlink
				{\prg_return_true:}
				{
					\bool_if:NF \g__pgfgo_sgfprob_links_warned_bool {
						\bool_gset_true:N \g__pgfgo_sgfprob_links_warned_bool
						\msg_warning:nn {pgfgo} {sgf-links}
					}
					\prg_return_false:
				}
		}
		{\prg_return_false:}
}
%EL EPIGRAFE #1, CON UN ENLACE AL DESTINO \l__pgfgo_sgfprob_link_tl SI ESTABA EN LA COMPILACION ANTERIOR.
\cs_new_protected:Npn \__pgfgo_sgfprob_link:n #1 {
	\__pgfgo_sgfprob_if_links:TF
		{\cs_if_exist:cTF {r@pgfgo@\l__pgfgo_sgfprob_link_tl} {\hyperlink{pgfgo.\l__pgfgo_sgfprob_link_tl}{#1}} {#1}}
		{#1}
}
%EL DESTINO #1 (statement O solution) ARRIBA DEL DIAGRAMA, SI TODAVIA NO ESTA.
\cs_new_protected:Npn \__pgfgo_sgfprob_target:n #1 {
	\__pgfgo_sgfprob_if_links:T {
		\tl_set:Ne \l__pgfgo_sgfprob_target_tl {\__pgfgo_sgfprob_id:n {#1}}
		\prop_if_in:NVF \g__pgfgo_sgfprob_targets_prop \l__pgfgo_sgfprob_target_tl {
			\prop_gput:NVn \g__pgfgo_sgfprob_targets_prop \l__pgfgo_sgfprob_target_tl {}
			\hbox_set:Nn \l__pgfgo_sgfdiag_cell_box {
				\hbox_overlap_right:n {
					\box_move_up:nn {\box_ht:N \l__pgfgo_sgfdiag_cell_box}
						{\hbox:n {\hypertarget{pgfgo.\l__pgfgo_sgfprob_target_tl}{}}}
				}
				\box_use:N \l__pgfgo_sgfdiag_cell_box
			}
			\legacy_if:nT {@filesw}
				{\iow_now:Ne \@auxout {\token_to_str:N \newlabel {pgfgo@\l__pgfgo_sgfprob_target_tl} {{}{}}}}
		}
	}
}

%EL ENUNCIADO: LA POSICION INICIAL, QUIEN JUEGA Y EL COMENTARIO DE LA RAIZ.
\cs_new_protected:Npn \__pgfgo_sgfprob_statement: {
	\tl_clear:N \l__pgfgo_sgfdiag_variation_tl
	\tl_set_eq:NN \l__pgfgo_sgfdiag_suffix_tl \l__pgfgo_sgfprob_game_tl
	\tl_set:Ne \l__pgfgo_sgfprob_link_tl {\__pgfgo_sgfprob_id:n {solution}}
	\__pgfgo_sgfdiag_draw:nnnn {1} {0}
		{
			\__pgfgo_sgfprob_link:n {
				%LOS DOS PUNTOS, SOLO SI DESPUES SE DICE QUIEN JUEGA.
				\tl_use:N \l__pgfgo_sgfprob_head_tl
				\tl_if_empty:NF \l__pgfgo_sgfprob_player_tl {
					\tl_if_empty:NF \l__pgfgo_sgfprob_head_tl {:~}
					\str_case:Vn \l__pgfgo_sgfprob_player_tl {
						{black} {\l__pgfgo_sgfprob_black_tl}
						{white} {\l__pgfgo_sgfprob_white_tl}
					}
				}
			}
		}
		{
			\bool_if:NT \l__pgfgo_sgfdiag_comments_bool {
				\__pgfgo_sgf_if_comment:nT {0}
					{\__pgfgo_sgfdiag_comments_below:n {\__pgfgo_sgf_comment_use:}}
			}
		}
	\__pgfgo_sgfprob_target:n {statement}
	\bool_if:NTF \l__pgfgo_sgfprob_alone_bool
		{\__pgfgo_sgfdiag_join: \pgfgo_layout_add_alone:N \l__pgfgo_sgfdiag_cell_box}
		{\pgfgo_layout_add:NN \l__pgfgo_sgfdiag_cell_box \l__pgfgo_sgfdiag_below_box}
}

%SI LA LINEA LEIDA (JUGADAS 0 A #1) ES CORRECTA PARA QUIEN JUEGA: EL ULTIMO GB O GW (POSICION BUENA PARA
%NEGRO O BLANCO); SI NO HAY, LA PRIMERA JUGADA CON TE O BM (LAS IMPARES SON DE QUIEN JUEGA: SU BM ES UN
%ERROR, EL DEL RIVAL NO); SI NO, "RIGHT" EN UN COMENTARIO (COMO EN goproblems.com). SI NO, NADA.
\cs_generate_variant:Nn \str_if_in:nnT {ee}
\cs_new_protected:Npn \__pgfgo_sgfprob_verdict:n #1 {
	\tl_clear:N \l__pgfgo_sgfprob_position_tl
	\tl_clear:N \l__pgfgo_sgfprob_moves_tl
	\bool_set_false:N \l__pgfgo_sgfprob_right_bool
	\int_step_inline:nnn {0} {#1} {
		\pgfgo_kernel_sgf_annotations:n {##1}
		\seq_map_inline:Nn \l_pgfgo_kernel_sgf_annotations_seq {\__pgfgo_sgfprob_judge:nnn {##1} ####1}
		\str_if_in:eeT {\pgfgo_kernel_sgf_comment:nn {##1} {true}} {RIGHT}
			{\bool_set_true:N \l__pgfgo_sgfprob_right_bool}
	}
	\tl_set:Ne \l__pgfgo_sgfprob_verdict_tl {
		\tl_if_empty:NTF \l__pgfgo_sgfprob_position_tl
			{
				\tl_if_empty:NTF \l__pgfgo_sgfprob_moves_tl
					{\bool_if:NT \l__pgfgo_sgfprob_right_bool {correct}}
					{\tl_use:N \l__pgfgo_sgfprob_moves_tl}
			}
			{\tl_use:N \l__pgfgo_sgfprob_position_tl}
	}
}
%LA ANOTACION #2 (CON VALOR #3) DE LA JUGADA #1.
\cs_new_protected:Npn \__pgfgo_sgfprob_judge:nnn #1#2#3 {
	\str_case:nn {#2} {
		{GB} {\__pgfgo_sgfprob_position:n {black}}
		{GW} {\__pgfgo_sgfprob_position:n {white}}
		{TE} {\__pgfgo_sgfprob_move:nnn {#1} {correct} {wrong}}
		{BM} {\__pgfgo_sgfprob_move:nnn {#1} {wrong} {correct}}
	}
}
\cs_new_protected:Npn \__pgfgo_sgfprob_position:n #1 {
	\tl_if_empty:NF \l__pgfgo_sgfprob_player_tl {
		\tl_set:Ne \l__pgfgo_sgfprob_position_tl
			{\str_if_eq:VnTF \l__pgfgo_sgfprob_player_tl {#1} {correct} {wrong}}
	}
}
%LA JUGADA #1: #2 SI ES DE QUIEN JUEGA (IMPAR), #3 SI ES DEL RIVAL. SOLO CUENTA LA PRIMERA.
\cs_new_protected:Npn \__pgfgo_sgfprob_move:nnn #1#2#3 {
	\bool_lazy_and:nnT {\tl_if_empty_p:N \l__pgfgo_sgfprob_moves_tl} {\int_compare_p:nNn {#1} > {0}} {
		\tl_set:Ne \l__pgfgo_sgfprob_moves_tl {\int_if_odd:nTF {#1} {#2} {#3}}
	}
}

%EL DIAGRAMA DE LA LINEA #2 (#1 ES SU NUMERO).
\cs_new_protected:Npn \__pgfgo_sgfprob_solution:nn #1#2 {
	\tl_set:Nn \l__pgfgo_sgfdiag_variation_tl {#2}
	\pgfgo_kernel_sgf_read:nn {\l__pgfgo_sgfdiag_file_tl} {#2}
	\__pgfgo_sgf_count_moves:Nn \l__pgfgo_sgfprob_last_int {\c_max_int}
	\tl_clear:N \l__pgfgo_sgfprob_verdict_tl
	\bool_if:NT \l__pgfgo_sgfprob_verdict_bool {\__pgfgo_sgfprob_verdict:n {\l__pgfgo_sgfprob_last_int}}
	\int_compare:nNnT {\l__pgfgo_sgfprob_last_int} > {0} {
		\tl_set:Ne \l__pgfgo_sgfdiag_suffix_tl
			{\tl_if_empty:NF \l__pgfgo_sgfprob_game_tl {\l__pgfgo_sgfprob_game_tl -} #1}
		\tl_set:Ne \l__pgfgo_sgfprob_link_tl {\__pgfgo_sgfprob_id:n {statement}}
		\__pgfgo_sgfdiag_draw:nnnn {1} {\l__pgfgo_sgfprob_last_int}
			{
				\__pgfgo_sgfprob_link:n {
					\int_compare:nNnT {\seq_count:N \l__pgfgo_sgfprob_games_seq} > {1} {\l__pgfgo_sgfprob_head_tl :~}
					\l__pgfgo_sgfprob_variation_title_tl \nobreakspace #1
					\tl_if_empty:NF \l__pgfgo_sgfprob_verdict_tl
						{\nobreakspace (\exp_args:Ne \pgfgo_text:n {\l__pgfgo_sgfprob_verdict_tl})}
				}
			}
			{\__pgfgo_sgfdiag_notes:nn {1} {\l__pgfgo_sgfprob_last_int}}
		\__pgfgo_sgfprob_target:n {solution}
		\pgfgo_layout_add:NN \l__pgfgo_sgfdiag_cell_box \l__pgfgo_sgfdiag_below_box
	}
}

\cs_new_protected:Npn \pgfgo_sgfproblem:nn #1#2 {
	\group_begin:
		\pgfgo_sgf_use_name:n {#2}
		\keys_set:nn {pgfgo / sgf~problem} {#1}
		\bool_set_eq:NN \l__pgfgo_sgf_annotations_bool \l__pgfgo_sgfprob_annotations_bool
		\bool_set_eq:NN \l__pgfgo_sgf_chat_bool \l__pgfgo_sgfprob_chat_bool
		\__pgfgo_sgfdiag_begin:Nn \l__pgfgo_sgfprob_layout_tl {#2}
		\tl_set:Nn \l__pgfgo_sgfdiag_sgf_restart_tl {false}
		%LOS DIAGRAMAS DE UN PROBLEMA SIEMPRE VAN NUMERADOS, SIN MARCA DE LA ULTIMA JUGADA.
		\bool_set_true:N \l__pgfgo_sgfdiag_numbers_bool
		\tl_clear:N \l__pgfgo_sgfdiag_last_tl
		\tl_set_eq:NN \l__pgfgo_sgfdiag_goban_tl \l__pgfgo_sgfprob_goban_tl
		\tl_set_eq:NN \l__pgfgo_sgfdiag_name_tl \l__pgfgo_sgfprob_name_tl
		\tl_set_eq:NN \l__pgfgo_sgfdiag_font_tl \l__pgfgo_sgfprob_font_tl
		\tl_set_eq:NN \l__pgfgo_sgfdiag_caption_min_tl \l__pgfgo_sgfprob_caption_min_tl
		\bool_set_eq:NN \l__pgfgo_sgfdiag_notes_bool \l__pgfgo_sgfprob_notes_bool
		\bool_set_eq:NN \l__pgfgo_sgfdiag_comments_bool \l__pgfgo_sgfprob_comments_bool
		\tl_set_eq:NN \l__pgfgo_sgfdiag_comment_font_tl \l__pgfgo_sgfprob_comment_font_tl
		\tl_set_eq:NN \l__pgfgo_sgfdiag_comment_align_tl \l__pgfgo_sgfprob_comment_align_tl
		\tl_set_eq:NN \l__pgfgo_sgfdiag_comment_separator_tl \l__pgfgo_sgfprob_comment_separator_tl
		\tl_set_eq:NN \l__pgfgo_sgfdiag_comment_position_tl \l__pgfgo_sgfprob_comment_position_tl
		\tl_set_eq:NN \l__pgfgo_sgfdiag_comment_width_tl \l__pgfgo_sgfprob_comment_width_tl
		\dim_set_eq:NN \l__pgfgo_sgfdiag_comment_sep_dim \l__pgfgo_sgfprob_comment_sep_dim
		\tl_set_eq:NN \l__pgfgo_sgfdiag_comment_height_tl \l__pgfgo_sgfprob_comment_height_tl
		\cs_set_eq:NN \__pgfgo_sgfdiag_comment_number:n \__pgfgo_sgfprob_comment_number:n
		\bool_set_false:N \l__pgfgo_sgfdiag_root_bool
		\seq_if_empty:NT \l__pgfgo_sgfprob_games_seq
			{\seq_put_right:Ne \l__pgfgo_sgfprob_games_seq {\int_use:N \l_pgfgo_kernel_sgf_game_int}}
		\__pgfgo_sgfprob_existing_games:n {#2}
		%PRIMERO LOS ENUNCIADOS DE TODAS LAS PARTIDAS, DESPUES LAS SOLUCIONES.
		\bool_if:NT \l__pgfgo_sgfprob_statement_bool {
			\seq_map_inline:Nn \l__pgfgo_sgfprob_games_seq {
				\int_set:Nn \l_pgfgo_kernel_sgf_game_int {##1}
				\__pgfgo_sgfprob_prepare:n {#2}
				\__pgfgo_sgfprob_head:n {##1}
				\__pgfgo_sgfprob_statement:
			}
		}
		\bool_if:NT \l__pgfgo_sgfprob_solutions_bool {
			\seq_map_inline:Nn \l__pgfgo_sgfprob_games_seq {
				\int_set:Nn \l_pgfgo_kernel_sgf_game_int {##1}
				\__pgfgo_sgfprob_prepare:n {#2}
				\__pgfgo_sgfprob_head:n {##1}
				\seq_map_indexed_inline:Nn \l__pgfgo_sgfprob_paths_seq
					{\__pgfgo_sgfprob_solution:nn {####1} {####2}}
			}
		}
		\pgfgo_layout_end:
		\__pgfgo_sgfdiag_after_flush:
	\group_end:
}

\NewDocumentCommand{\sgfproblem}{O{}m}{
	\__pgfgo_sgf_if_kernel:n {\pgfgo_sgfproblem:nn {#1} {#2}}
}

\ExplSyntaxOff