summaryrefslogtreecommitdiff
path: root/fonts/chess/skak/tex
diff options
context:
space:
mode:
authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /fonts/chess/skak/tex
Initial commit
Diffstat (limited to 'fonts/chess/skak/tex')
-rw-r--r--fonts/chess/skak/tex/demo-symbols.tex43
-rw-r--r--fonts/chess/skak/tex/skak.fd11
-rw-r--r--fonts/chess/skak/tex/skak.sty2037
3 files changed, 2091 insertions, 0 deletions
diff --git a/fonts/chess/skak/tex/demo-symbols.tex b/fonts/chess/skak/tex/demo-symbols.tex
new file mode 100644
index 0000000000..17dd65f657
--- /dev/null
+++ b/fonts/chess/skak/tex/demo-symbols.tex
@@ -0,0 +1,43 @@
+\documentclass{article}
+\usepackage{chess-workshop-symbols}
+\begin{document}
+\begin{tabular}{ll}
+\verb|\wbetter| & \wbetter \\
+\verb|\bbetter| & \bbetter \\
+\verb|\wupperhand| & \wupperhand \\
+\verb|\bupperhand| & \bupperhand \\
+\verb|\wdecisive| & \wdecisive \\
+\verb|\bdecisive| & \bdecisive \\
+\verb|\equal| & \equal \\
+\verb|\unclear| & \unclear \\
+\verb|\compensation| & \compensation \\
+\verb|\withattack| & \withattack \\
+\verb|\withinit| & \withinit \\
+\verb|\counterplay| & \counterplay \\
+\verb|\zugzwang| & \zugzwang \\
+\verb|\mate| & \mate \\
+\verb|\withidea| & \withidea \\
+\verb|\onlymove| & \onlymove \\
+\verb|\betteris| & \betteris \\
+\verb|\file| & \file \\
+\verb|\diagonal| & \diagonal \\
+\verb|\kside| & \kside \\
+\verb|\qside| & \qside \\
+\verb|\weakpt| & \weakpt \\
+\verb|\bishoppair| & \bishoppair \\
+\verb|\opposbishops| & \opposbishops \\
+\verb|\samebishops| & \samebishops \\
+\verb|\unitedpawns| & \unitedpawns \\
+\verb|\seppawns| & \seppawns \\
+\verb|\doublepawns| & \doublepawns \\
+\verb|\morepawns| & \morepawns \\
+\verb|\timelimit| & \timelimit \\
+\verb|\novelty| & \novelty \\
+\verb|\comment| & \comment \\
+\verb|\various| & \various \\
+\verb|\without| & \without \\
+\verb|\with| & \with \\
+\verb|\etc| & \etc \\
+\verb|\see| & \see \\
+\end{tabular}
+\end{document}
diff --git a/fonts/chess/skak/tex/skak.fd b/fonts/chess/skak/tex/skak.fd
new file mode 100644
index 0000000000..e89f0b6250
--- /dev/null
+++ b/fonts/chess/skak/tex/skak.fd
@@ -0,0 +1,11 @@
+\DeclareFontFamily{U}{skak}{}
+ \DeclareFontShape{U}{skak}{m}{n}{<-> skakf10 }{}
+ \DeclareFontShape{U}{skak}{m}{sl}{<-> sub skakf10/m/n }{}
+ \DeclareFontShape{U}{skak}{m}{it}{<-> sub skakf10/m/n }{}
+ \DeclareFontShape{U}{skak}{m}{sc}{<-> sub skakf10/m/n }{}
+ \DeclareFontShape{U}{skak}{m}{u}{<-> sub skakf10/m/n }{}
+ \DeclareFontShape{U}{skak}{bx}{n}{<-> skakf10b }{}
+ \DeclareFontShape{U}{skak}{bx}{sl}{<-> sub skakf10b/bx/n }{}
+ \DeclareFontShape{U}{skak}{bx}{it}{<-> sub skakf10b/bx/n }{}
+ \DeclareFontShape{U}{skak}{b}{u}{<-> skakf10b }{}
+\endinput
diff --git a/fonts/chess/skak/tex/skak.sty b/fonts/chess/skak/tex/skak.sty
new file mode 100644
index 0000000000..ac731d7650
--- /dev/null
+++ b/fonts/chess/skak/tex/skak.sty
@@ -0,0 +1,2037 @@
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{skak}[2018/01/08 v1.5.3 Chess typesetting]
+
+\DeclareOption{tiny}{\AtEndOfClass{\tinyboard}}
+\DeclareOption{small}{\AtEndOfClass{\smallboard}}
+\DeclareOption{normal}{\AtEndOfClass{\normalboard}}
+\DeclareOption{large}{\AtEndOfClass{\largeboard}}
+\DeclareOption{notation}{\AtEndOfClass{\notationOn}}
+\DeclareOption{mover}{\AtEndOfClass{\showmoverOn}}
+\DeclareOption{moveroff}{\AtEndOfClass{\showmoverOff}}
+\DeclareOption{notationoff}{\AtEndOfClass{\notationOff}}
+\DeclareOption{ps}{\def\ps@on{\True}}
+\DeclareOption{psoff}{\def\ps@on{\False}}
+\DeclareOption{english}{\AtEndOfClass{\skaklanguage[english]}}
+\DeclareOption{styleA}{\AtEndOfClass{\styleA}}
+\DeclareOption{styleB}{\AtEndOfClass{\styleB}}
+\DeclareOption{styleC}{\AtEndOfClass{\styleC}}
+\DeclareOption{skaknew}{%
+ \PassOptionsToPackage{skaknew}{chessfss}}
+\ExecuteOptions{notation,normal,psoff,english,moveroff,styleB}
+\ProcessOptions
+
+\RequirePackage{chessfss}
+
+%% changed by UF to stop a clash with \And of amsmath,
+%% also changed every occurance of \And to
+%% \LambdaAnd in this sty-file.
+\let\Ori@nd\And
+\RequirePackage{lambda,ifthen,calc,textcomp}
+\let\LambdaAnd\And
+\let\And\Ori@nd
+%% end of change
+\ps@on{\RequirePackage{pstricks,pst-node}\SpecialCoor%
+ \newpsstyle{psskak}{arrowinset=0,nodesep=.25,armA=.75,arrowsize=.2 1,
+ linearc=.2,arrowlength=1.25,linewidth=0.04,
+ doubleline=true,doublesep=.06}}{}
+
+% to avoid problems when switching back from styleC
+\def\normalstyles{%
+ \def\mainlinestyle{\bfseries}% could also contain
+ % definitions of the
+ % various style options
+ \def\variationstyle{}% as with mainlinestyle
+}
+\def\styleC@on{\False}
+
+% list related functions
+\def\IsNil#1{#1{\False}{\True}}
+
+\def\Member#1#2#3% ('a -> 'a -> bool) -> 'a -> 'a list -> bool
+ {#3{\MemberA{#1}{#2}}{\False}}
+\def\MemberA#1#2#3#4%
+ {#1{#2}{#3}%
+ {\True}%
+ {\Member{#1}{#2}{#4}}}
+
+% Explode: string -> char list
+\def\Explode#1{\EqStr{Z}{#1}{\Nil}{\ExplodeA#1Z}}
+\def\ExplodeA#1#2Z{\EqStr{Z}{#2}%
+ {\Singleton{#1}}%
+ {\Cons{#1}{\ExplodeA#2Z}}}
+
+\def\BoolToString#1{% bool -> string
+#1{True}{False}}
+
+% the basic manipulation of the board
+\def\Set#1#2{% square -> piece -> unit
+\expandafter\xdef\csname#1\endcsname{#2}}
+\def\Get#1{% square -> piece
+\csname#1\endcsname}
+
+\def\StoreBool#1#2{%
+ \expandafter\def\csname#1\endcsname{#2}}
+\def\GetBool#1{%
+ \csname#1\endcsname}
+
+
+\def\PieceNames{\Listize[K,Q,R,B,N,p]}
+\def\FileNames{\Listize[a,b,c,d,e,f,g,h]}
+\def\RankNames{\Listize[1,2,3,4,5,6,7,8]}
+
+\def\showonly#1{\expandafter\def\csname ShowOnlyList\endcsname{\Listize[#1]}}
+\def\showall{\showonly{K,Q,R,B,N,P,k,q,r,b,n,p}}
+\showall
+
+\def\showonlywhite{\showonly{K,Q,R,B,N,P}}
+\def\showonlyblack{\showonly{k,q,r,b,n,p}}
+\def\showonlypawns{\showonly{p,P}}
+
+
+\def\NotMember#1#2{% a list -> a -> bool
+ \Not{\Member{\EqStr}{#2}{#1}}}
+
+\def\showallbut#1{%
+ \expandafter\def\csname ShowOnlyList\endcsname{%
+ \Filter{\NotMember{\Listize[#1]}}%
+ {\Listize[K,Q,R,B,N,P,k,q,r,b,n,p]}}}
+
+%%%
+\def\TeXifx#1#2#3%
+ {#1\def\next{#2}\else\def\next{#3}\fi
+ \next}
+\def\EqStr#1#2{% % has to be changed
+ \TeXif{\if#1#2}}
+\def\EqPiece#1#2{\TeXif{\if#1#2}}
+
+
+\def\RankOf(#1){\Second{#1}}
+\def\FileOf(#1){\First{#1}}
+
+\def\EqSquare#1#2{%
+ \ifthenelse{\equal{#1}{#2}}{\True}{\False}}
+
+%% is this really necessary????
+\def\MySecond(#1#2){#2}
+\def\MyFirst(#1#2){#1}
+
+\def\MyEqual#1#2{% string -> string -> bool
+ \xdef\arga{#1}\xdef\argb{#2}%
+ \TeXif{\ifx\arga\argb }}
+
+\def\MyEqualB#1#2#3#4{%
+ \ifthenelse{\equal{#1}{#2}}{#3}{#4}}
+
+\def\myrightfile#1#2{% filediscriminator -> square -> bool
+ \Member{\MyEqual}{#2}{\File{#1}}}
+
+\def\RightRank(#1){%square -> bool
+ \EqStr{\RankDiscriminator}{Z}%
+ {\True}%
+ {\Member{\MyEqual}{#1}{\Rank{\RankDiscriminator}}}}
+\def\RightFile(#1){%square -> bool
+ \EqStr{\FileDiscriminator}{Z}%
+ {\True}%
+ {\Member{\MyEqual}{#1}{\File{\FileDiscriminator}}}}
+
+
+\def\Glue#1#2% 'a -> 'b -> 'ab , eg. a -> 1 -> a1
+{#1#2}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%% adding ornaments to a board %%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% PSTricks addon that allows hollow arrowheads
+\ps@on{%
+\edef\pst@arrowtable{\pst@arrowtable,<|-|>}
+\def\tx@ArrowTriangleA{ArrowTriangleA }
+\def\tx@ArrowTriangleB{ArrowTriangleB }
+\@namedef{psas@|>}{%
+ /ArrowTriangleA { CLW dup 3.5 div SLW mul add dup 2 div /w ED mul dup
+ /h ED mul /a ED
+ 0 h a sub moveto w h L 0 0 L w neg h L 0 h a sub L
+ gsave 1 setgray fill grestore gsave
+ stroke grestore } def
+ \psk@arrowinset \psk@arrowlength \psk@arrowsize
+ \tx@ArrowTriangleA}
+\@namedef{psas@<|}{%
+ /ArrowTriangle { CLW dup 2 div SLW mul add dup 2 div
+ /w ED mul dup /h ED mul /a ED
+ { 0 h T 1 -1 scale } if w neg h moveto 0 0 L w h L w neg a neg
+ rlineto w neg a rlineto w 0 rmoveto gsave stroke grestore } def
+ true \psk@arrowinset \psk@arrowlength \psk@arrowsize
+ \tx@ArrowTriangleB}
+% end of PSTricks addon
+}
+{}
+
+%% Converts a file letter like `e' to its coordinate
+%% number, which would be `5' in this example.
+\def\file@from@letter#1{%
+ \EqStr{#1}{a}{1}
+ {\EqStr{#1}{b}{2}
+ {\EqStr{#1}{c}{3}
+ {\EqStr{#1}{d}{4}
+ {\EqStr{#1}{e}{5}
+ {\EqStr{#1}{f}{6}
+ {\EqStr{#1}{g}{7}
+ {\EqStr{#1}{h}{8}{}}}}}}}}}
+
+%% Several new counters for calculating the translation
+%% to an arbitrary square from the ``board marker''.
+\newcounter{fileFrom}
+\newcounter{rankFrom}
+\newcounter{fileTo}
+\newcounter{rankTo}
+\newcounter{ps@inverse}
+\newcounter{ps@knightangle}
+
+%% Computes the ``translation'' from the board marker
+%% `BM' to the given square and stores the results
+%% in `fileTo' and `rankTo'
+\def\get@translation#1#2{%
+ \ifnum\value{ps@inverse}=0%
+ \setcounter{fileTo}{8}%
+ \setcounter{rankTo}{#2}%
+ \addtocounter{fileTo}{-\file@from@letter{#1}}%
+ \addtocounter{rankTo}{-1}%
+ \else%
+ \setcounter{fileTo}{\file@from@letter{#1}}%
+ \setcounter{rankTo}{8}%
+ \addtocounter{fileTo}{-1}%
+ \addtocounter{rankTo}{-#2}%
+ \fi}
+
+%% Sets the PostScript origin to the ``board marker''
+%% first. Then the coordinate system is translated
+%% to the specified square.
+\def\skak@translate#1#2{%
+ \get@translation#1#2%
+ \translate(BM)%
+ \translate(-\arabic{fileTo}.0,\arabic{rankTo}.0)}
+
+%% Computes the ``file angle'' for the two
+%% given files of a valid knight move and adds
+%% the value to the counter `ps@knightangle'.
+\def\add@fileangle#1#2{%
+ \setcounter{fileTo}{\file@from@letter{#1}}%
+ \setcounter{rankTo}{\file@from@letter{#2}}%
+ \addtocounter{rankTo}{-\value{fileTo}}%
+ \ifnum\value{rankTo}=1%
+ \else%
+ \ifnum\value{rankTo}=-1%
+ \else%
+ \ifnum\value{rankTo}=2%
+ \else%
+ \ifnum\value{rankTo}=-2%
+ \addtocounter{ps@knightangle}{180}%
+ \else%
+ \errmessage{Files #1 and #2 do not belong to a valid knight move}%
+ \fi%
+ \fi%
+ \fi%
+ \fi}
+
+%% Computes the ``rank angle'' for the two
+%% given ranks of a valid knight move and adds
+%% the value to the counter `ps@knightangle'.
+\def\add@rankangle#1#2{%
+ \setcounter{fileTo}{#1}%
+ \setcounter{rankTo}{#2}%
+ \addtocounter{rankTo}{-\value{fileTo}}%
+ \ifnum\value{rankTo}=1%
+ \else%
+ \ifnum\value{rankTo}=-1%
+ \else%
+ \ifnum\value{rankTo}=2%
+ \addtocounter{ps@knightangle}{90}%
+ \else%
+ \ifnum\value{rankTo}=-2%
+ \addtocounter{ps@knightangle}{270}%
+ \else%
+ \errmessage{Ranks #1 and #2 do not belong to a valid knight move}%
+ \fi%
+ \fi%
+ \fi%
+ \fi}
+
+%% Prints the ``file angle'' for the given
+%% files of a valid knight move (for testing purposes).
+\def\printfileangle#1#2{%
+ fileangle: %
+ \setcounter{ps@knightangle}{0}%
+ \add@fileangle{#1}{#2}%
+ \arabic{ps@knightangle}}
+
+%% Prints the ``rank angle'' for the given
+%% ranks of a valid knight move (for testing purposes).
+\def\printrankangle#1#2{%
+ rankangle: %
+ \setcounter{ps@knightangle}{0}%
+ \add@rankangle{#1}{#2}%
+ \arabic{ps@knightangle}}
+
+%% Multiplies the counter with the given name
+%% by the current length of a board square.
+\def\multiply@by@sqlength#1{%
+ \count255=\value{#1}%
+ \multiply\count255 by \square@multiplier%
+ \setcounter{#1}{\the\count255}}
+
+%% Multiplies the counters for the ``from''
+%% and ``to'' squares by the current length
+%% of a board square.
+\def\convert@to@pt{%
+ \multiply@by@sqlength{fileFrom}%
+ \multiply@by@sqlength{rankFrom}%
+ \multiply@by@sqlength{fileTo}%
+ \multiply@by@sqlength{rankTo}}
+
+%% Sets the special markers ``From'' and ``To'' by
+%% directly outputting PS commands.
+\def\set@special@psmarkers#1#2{%
+ \get@translation#1%
+ \setcounter{fileFrom}{\value{fileTo}}%
+ \setcounter{rankFrom}{\value{rankTo}}%
+ \get@translation#2%
+ \convert@to@pt%
+ \special{ps: tx@Dict begin gsave STP newpath tx@NodeDict begin
+ tx@NodeDict /N@BM known { /N@BM load GetCenter }
+ { 0 0 } ifelse moveto
+ {-\arabic{fileFrom}.0 \arabic{rankFrom}.0}
+ false /N@From 10 {InitPnode } NewNode
+ {-\arabic{fileTo}.0 \arabic{rankTo}.0}
+ false /N@To 10 {InitPnode } NewNode
+ end grestore end}}
+
+%% Outputs a ``knight move'' arrow from the first
+%% square to the second.
+\def\printknightmove#1#2{%
+ \setcounter{ps@knightangle}{0}%
+ \add@fileangle{\First#1}{\First#2}%
+ \add@rankangle{\Second#1}{\Second#2}%
+ \addtocounter{ps@knightangle}{\value{ps@inverse}}%
+ \set@special@psmarkers{#1}{#2}%
+ \ncdiagg[style=psskak,angleA=\arabic{ps@knightangle}]{-|>}{From}{To}}
+
+%% Outputs an arrow from the first board
+%% square to the second.
+\def\printarrow#1#2{%
+ \set@special@psmarkers{#1}{#2}%
+ \ncline[style=psskak]{-|>}{From}{To}}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%% Highlighting squares, including the %%%%%%%%%%%%%%%
+%%%%% support for marker pieces (db <2002-11-12>) %%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\def\ps@markersquare#1{%
+ \pscustom[linewidth=.06]{\skak@translate#1\psframe(-.5,-.5)(.5,.5)}}
+
+\def\ps@markerx#1{%
+ \pscustom[linewidth=.06]{\skak@translate#1%
+ \psline{-}(-.3,-.3)(.3,.3)}%
+ \pscustom[linewidth=.06]{\skak@translate#1%
+ \psline{-}(-.3,.3)(.3,-.3)}}
+
+\def\ps@markero#1{%
+ \pscustom[linewidth=.06]{\skak@translate#1%
+ \pscircle{.35}}}
+
+\def\ps@markerX#1{%
+ \pscustom[linewidth=.06]{\skak@translate#1%
+ \psline{-}(-.5,-.5)(.5,.5)}%
+ \pscustom[linewidth=.06]{\skak@translate#1%
+ \psline{-}(-.5,.5)(.5,-.5)}}
+
+\def\ps@markerO#1{%
+ \pscustom[linewidth=.06]{\skak@translate#1%
+ \pscircle{.7}}}
+
+%%
+%% The definitions of the next macros follow:
+%% Bechtolsheim, Stephan v.: "A tutorial on \futurelet" in:
+%% TUG: "TUGboat. The TeX Users Group Newsletter", Vol. 9, 1988, pp. 276
+%%
+
+\def\highlight@WithOpt[#1]#2{%
+ \EqStr{#1}{x}{\Apply{\ps@markerx}{\Listize[#2]}}%
+ {\EqStr{#1}{o}{\Apply{\ps@markero}{\Listize[#2]}}%
+ {\EqStr{#1}{X}{\Apply{\ps@markerX}{\Listize[#2]}}%
+ {\EqStr{#1}{O}{\Apply{\ps@markerO}{\Listize[#2]}}%
+ {\Apply{\ps@markersquare}{\Listize[#2]}}}}}%
+}
+
+\def\highlight@NoOpt#1{\Apply{\ps@markersquare}{\Listize[#1]}}
+
+\def\highlight@Decide{\ifx\highlight@Look [ \let\next=\highlight@WithOpt
+ \else \let\next=\highlight@NoOpt \fi \next}
+
+% Usage: Either "\highlight{CSLS}" or "\highlight[MS]{CSLS}"
+% where CSLS is the comma separated list of squares
+% and MS is the marker symbol ("x", "X", "o" or "O") that
+% is used.
+\def\highlight{\futurelet\highlight@Look\highlight@Decide}
+
+%%%%% end of adding ornaments to a board %%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%% support for other languages %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% \uc@king queen rook bishop knight pawn holds the letters
+% representinng the pieces in the current language
+% \skak@currentPieceNames : char list, holds the current piece names
+% \def\skak@pieceToEnglish#1{% string -> string, (pgn(curr. lang) -> pgn(eng))
+% \skak@piece@toEnglish(#1Z)}
+\def\skak@piece@toEnglish#1{%
+ \EqPiece{#1}{\uc@king}%
+ {K}%
+ {\EqPiece{#1}{\uc@queen}%
+ {Q}%
+ {\EqPiece{#1}{\uc@rook}%
+ {R}%
+ {\EqPiece{#1}{\uc@bishop}%
+ {B}%
+ {\EqPiece{#1}{\uc@knight}%
+ {N}%
+ {\EqPiece{#1}{\uc@pawn}% added 2005.03.30 UF
+ {p}%
+ {\errmessage{not a valid piece name in the current language:#1}}}}}}}}
+
+\def\skak@englishToEnglish#1{#1}
+
+\def\skak@definepieces#1#2#3#4#5#6{%
+ \edef\uc@king{#1}
+ \edef\uc@queen{#2}
+ \edef\uc@rook{#3}
+ \edef\uc@bishop{#4}
+ \edef\uc@knight{#5}
+ \edef\uc@pawn{#6}}
+
+\def\newskaklanguage#1#2{%
+ \expandafter\xdef\csname skaklanguage.#1\endcsname{#2}}
+
+\newcommand{\skaklanguage}[1][english]{%
+ \def\currentlanguage{#1}%
+ \ifthenelse{\equal{#1}{english}}%
+ {\let\skak@pieceToEnglish=\skak@englishToEnglish%
+ \def\PieceNames{\Listize[K,Q,R,B,N,p]}}
+ {\edef\temp@lang{\csname skaklanguage.#1\endcsname}
+ \expandafter\skak@definepieces\temp@lang%
+ \let\skak@pieceToEnglish=\skak@piece@toEnglish%
+ \def\PieceNames{%
+ \Listize[\uc@king,\uc@queen,\uc@rook,\uc@bishop,\uc@knight,\uc@pawn]}}}
+
+
+\def\showskaklanguage{%
+ (\uc@king)(\uc@queen)(\uc@rook)(\uc@bishop)(\uc@knight)(\uc@pawn)}
+
+%%%%% end of language support %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%% parsing macros %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\def\IsPieceName#1{\Member{\EqPiece}{#1}\PieceNames}
+\def\IsFile#1% char -> bool
+{\Member{\EqStr}{#1}\FileNames}
+\def\IsRank#1% char -> bool
+{\Member{\EqStr}{#1}\RankNames}
+\def\IsCapture#1% char -> bool
+{\EqStr{#1}{x}}
+\def\IsPromotion#1% char -> bool
+{\EqStr{#1}{=}}
+\def\IsDash#1% char -> bool
+{\EqStr{#1}{-}}
+\def\IsO#1% char -> bool
+{\EqStr{#1}{O}}
+
+\def\File#1% file -> square list, eg. a -> [a1,a2,...,a8]
+{\Map{\Glue{#1}}{\RankNames}}
+\def\Rank#1% rank -> square list, eg. 1 -> [a1,b1,...,h1]
+{\Map{\Twiddle\Glue{#1}}{\FileNames}}
+
+
+% Compose: ('b -> 'c) -> ('a -> 'b) -> ('a -> c')
+% Second: 'a -> 'b -> 'b
+% f: 'a -> unit
+% Compose Second f: 'a -> ('a -> 'b -> unit)
+% \def\Apply#1#2% ('a -> unit) -> ('a list -> unit)
+% {\Force{\Map{#1}{#2}}}
+% \def\Force#1{#1\ForceA{}}
+% \def\ForceA#1{#1\Foldr\DoIt{}}
+% \def\DoIt#1#2{#1#2}
+
+\def\Sideeffect#1#2#3{% ('a -> unit) -> ('a -> 'b -> unit)
+ #1{#2}#3}
+
+\def\Apply#1#2{% ('a -> unit) -> 'a list -> unit
+ \Foldr{\Sideeffect{#1}}{\relax}{#2}}
+
+
+\def\EmptyBoard%
+{\Apply{\Twiddle\Set{E}}{\Rank{1}}
+\Apply{\Twiddle\Set{E}}{\Rank{2}}
+\Apply{\Twiddle\Set{E}}{\Rank{3}}
+\Apply{\Twiddle\Set{E}}{\Rank{4}}
+\Apply{\Twiddle\Set{E}}{\Rank{5}}
+\Apply{\Twiddle\Set{E}}{\Rank{6}}
+\Apply{\Twiddle\Set{E}}{\Rank{7}}
+\Apply{\Twiddle\Set{E}}{\Rank{8}}}
+
+
+\def\FenConvert#1{%
+ \EqStr{8}{#1}%
+ {EEEEEEEE}%
+ {\EqStr{7}{#1}%
+ {EEEEEEE}%
+ {\EqStr{6}{#1}%
+ {EEEEEE}%
+ {\EqStr{5}{#1}%
+ {EEEEE}%
+ {\EqStr{4}{#1}%
+ {EEEE}%
+ {\EqStr{3}{#1}%
+ {EEE}%
+ {\EqStr{2}{#1}%
+ {EE}%
+ {\EqStr{1}{#1}%
+ {E}%
+ {#1}}}}}}}}}
+
+
+\def\ParseFenRank#1{\ParseFenRankA(#1Z)}
+\def\ParseFenRankA(#1#2){%
+ \EqStr{Z}{#1}%
+ {}%
+ {\FenConvert{#1}\ParseFenRankA(#2)}}
+
+\def\SetCheckKing#1#2{% square -> piece -> unit
+ \EqStr{K}{#2}%
+ {\edef\WhiteKingSquare{#1}}%
+ {\EqStr{k}{#2}%
+ {\edef\BlackKingSquare{#1}}%
+ {}}%
+ \Set{#1}{#2}}
+
+\def\InitRank#1#2#3#4#5#6#7#8#9{%
+ \SetCheckKing{a#9}{#1}%
+ \SetCheckKing{b#9}{#2}%
+ \SetCheckKing{c#9}{#3}%
+ \SetCheckKing{d#9}{#4}%
+ \SetCheckKing{e#9}{#5}%
+ \SetCheckKing{f#9}{#6}%
+ \SetCheckKing{g#9}{#7}%
+ \SetCheckKing{h#9}{#8}}
+
+\def\SetRank#1#2{% rank -> fenrank -> unit
+ \edef\pap{\ParseFenRank{#2}}%
+ \expandafter\InitRank\pap#1}
+
+
+\def\InitBoard(#1/#2/#3/#4/#5/#6/#7/#8){%
+ \SetRank{8}{#1}%
+ \SetRank{7}{#2}%
+ \SetRank{6}{#3}%
+ \SetRank{5}{#4}%
+ \SetRank{4}{#5}%
+ \SetRank{3}{#6}%
+ \SetRank{2}{#7}%
+ \SetRank{1}{#8}%
+ }
+
+\def\WhiteCastling{-}
+\def\BlackCastling{-}
+
+\def\ExtractWhiteCastling#1{\def\tempCastling{-}%
+\ExtractWhiteCastlingA(#1Z)%
+\edef\WhiteCastling{\tempCastling}}
+\def\ExtractWhiteCastlingA(#1#2){%
+ \EqStr{Z}{#1}%
+ {}%
+ {\Or{\EqPiece{K}{#1}}{\EqPiece{Q}{#1}}%
+ {\EqStr{-}{\tempCastling}%
+ {\edef\tempCastling{#1}\ExtractWhiteCastlingA(#2)}%
+ {\edef\tempCastling{\tempCastling#1}}}%
+ {\ExtractWhiteCastlingA(#2)}}}
+
+\def\ExtractBlackCastling#1{\def\tmpCastling{-}%
+\ExtractBlackCastlingA(#1Z)%
+\edef\BlackCastling{\tmpCastling}}
+\def\ExtractBlackCastlingA(#1#2){%
+ \EqStr{Z}{#1}%
+ {}%
+ {\Or{\EqPiece{k}{#1}}{\EqPiece{q}{#1}}%
+ {\EqStr{-}{\tmpCastling}%
+ {\edef\tmpCastling{#1}\ExtractBlackCastlingA(#2)}%
+ {\edef\tmpCastling{\tmpCastling#1}}}%
+ {\ExtractBlackCastlingA(#2)}}}
+
+\newcounter{halfmove}
+\newcounter{move}
+\def\@fenboard#1{\FenBoard#1)}
+\def\FenBoard#1 #2 #3 #4 #5 #6){%
+ \InitBoard(#1)%
+ \EqStr{w}{#2}%
+ {\gdef\WhiteToMove{\True}}%
+ {\gdef\WhiteToMove{\False}}%\EqStr{w}{#2}}%
+ \ExtractWhiteCastling{#3}%}
+ \ExtractBlackCastling{#3}%}
+ \edef\EnPassantSquare{#4}%
+ \setcounter{halfmove}{#5}%
+ \setcounter{move}{#6}}
+
+\def\fenboard#1{%
+% \@fenboard#1%
+ \FenBoard#1)%
+ \@initstorage}
+
+
+\newcounter{helpgobble}
+\def\PieceToFen#1{%
+ \EqPiece{E}{#1}%
+ {1}{#1}}
+
+\def\Fen@RawRank#1{\PieceToFen{\Get{a#1}}\PieceToFen{\Get{b#1}}%
+ \PieceToFen{\Get{c#1}}\PieceToFen{\Get{d#1}}%
+ \PieceToFen{\Get{e#1}}\PieceToFen{\Get{f#1}}%
+ \PieceToFen{\Get{g#1}}\PieceToFen{\Get{h#1}}}
+
+\def\PrintCastling{%
+ \EqStr{-}{\WhiteCastling}%
+ {\BlackCastling}%
+ {\WhiteCastling%
+ \EqStr{-}{\BlackCastling}%
+ {-}%
+ {\BlackCastling}}}
+
+
+\def\Fen@handlenumbers#1#2#3#4#5#6#7#8{\setcounter{helpgobble}{0}%
+ \Fen@handleA(#1#2#3#4#5#6#7#8Z)}
+\def\Fen@handleA(#1#2){%
+ \EqStr{Z}{#1}%
+ {\ifnum0=\thehelpgobble%
+ \else\edef\temp@rank{\temp@rank\arabic{helpgobble}}\fi}%
+ {\EqPiece{1}{#1}%
+ {\stepcounter{helpgobble}\Fen@handleA(#2)}%
+ {\ifnum0=\thehelpgobble\edef\temp@rank{\temp@rank#1}\Fen@handleA(#2)%
+ \else\edef\temp@rank{\temp@rank\arabic{helpgobble}#1}%
+ \setcounter{helpgobble}{0}\Fen@handleA(#2)\fi}}}
+
+
+\def\Fen@Rank#1{\edef\temp@rank{}\edef\temp@rankA{\Fen@RawRank{#1}}%
+ \expandafter\Fen@handlenumbers\temp@rankA}
+
+\def\Fen@calculate{%
+ \Fen@Rank{8}\edef\temp@board{\temp@rank/}%
+ \Fen@Rank{7}\edef\temp@board{\temp@board\temp@rank/}%
+ \Fen@Rank{6}\edef\temp@board{\temp@board\temp@rank/}%
+ \Fen@Rank{5}\edef\temp@board{\temp@board\temp@rank/}%
+ \Fen@Rank{4}\edef\temp@board{\temp@board\temp@rank/}%
+ \Fen@Rank{3}\edef\temp@board{\temp@board\temp@rank/}%
+ \Fen@Rank{2}\edef\temp@board{\temp@board\temp@rank/}%
+ \Fen@Rank{1}\edef\temp@board{\temp@board\temp@rank}%
+ \edef\temp@board{\temp@board\space\WhiteToMove{w}{b}}%
+ \edef\temp@board{\temp@board\space\PrintCastling\space\EnPassantSquare}%
+ \edef\temp@board{\temp@board\space\arabic{halfmove}\space\arabic{move}}}
+
+
+\def\boardasfen{\Fen@calculate\temp@board} % if someone wants fen in
+ % their document
+
+
+%%%%% manipulation of the board state
+% the special out-of-bounds square
+\Set{Offboard}{X} % note: no piece is named X
+
+\def\EnPassantSquare{-}% updated by ExecuteMove
+
+
+\def\WhiteToMove{\True}
+
+\xdef\WhiteKingSquare% unit -> square
+{e1}
+\xdef\BlackKingSquare% unit -> square
+{e8}
+\def\KingSquare#1{% bool -> square
+#1\WhiteKingSquare\BlackKingSquare}
+\def\SetKingSquare#1#2{% bool -> square -> unit
+ #1{\xdef\WhiteKingSquare{#2}}{\xdef\BlackKingSquare{#2}}}
+
+
+% neighbours of a square
+\def\SetNeighbour#1#2#3% direction -> square -> square -> unit, #2's
+ % neighbour in direction #1 is #3
+{\expandafter\xdef\csname#1.#2\endcsname{#3}}
+\def\GetNeighbour#1#2% direction -> square -> square
+{\csname#1.#2\endcsname}
+% all the hard work:
+% first we deal with the board border
+\def\FF#1#2{\SetNeighbour{#1}{#2}{Offboard}}
+
+\def\ForwardDirection#1% bool -> direction; up for white, down for black
+{#1{up}{down}}
+\def\BackwardDirection#1% bool -> direction
+{#1{down}{up}}
+\def\LeftDirection#1% bool -> direction
+{#1{left}{right}}
+\def\RightDirection#1% bool -> direction
+{#1{right}{left}}
+
+
+\Apply{\FF{left}}{\File{a}}
+\Apply{\FF{upleft}}{\File{a}}
+\Apply{\FF{downleft}}{\File{a}}
+\Apply{\FF{right}}{\File{h}}
+\Apply{\FF{upright}}{\File{h}}
+\Apply{\FF{downright}}{\File{h}}
+\Apply{\FF{up}}{\Rank{8}}
+\Apply{\FF{upleft}}{\Rank{8}}
+\Apply{\FF{upright}}{\Rank{8}}
+\Apply{\FF{down}}{\Rank{1}}
+\Apply{\FF{downleft}}{\Rank{1}}
+\Apply{\FF{downright}}{\Rank{1}}
+
+
+\def\SetUpNeighbour#1#2#3% direction -> rank -> rank -> unit
+{\SetNeighbour{#1}{a#2}{a#3}%
+ \SetNeighbour{#1}{b#2}{b#3}%
+ \SetNeighbour{#1}{c#2}{c#3}%
+ \SetNeighbour{#1}{d#2}{d#3}%
+ \SetNeighbour{#1}{e#2}{e#3}%
+ \SetNeighbour{#1}{f#2}{f#3}%
+ \SetNeighbour{#1}{g#2}{g#3}%
+ \SetNeighbour{#1}{h#2}{h#3}}
+\let\SetDownNeighbour=\SetUpNeighbour%
+\SetUpNeighbour{up}{1}{2}
+\SetUpNeighbour{up}{2}{3}
+\SetUpNeighbour{up}{3}{4}
+\SetUpNeighbour{up}{4}{5}
+\SetUpNeighbour{up}{5}{6}
+\SetUpNeighbour{up}{6}{7}
+\SetUpNeighbour{up}{7}{8}
+\SetDownNeighbour{down}{2}{1}
+\SetDownNeighbour{down}{3}{2}
+\SetDownNeighbour{down}{4}{3}
+\SetDownNeighbour{down}{5}{4}
+\SetDownNeighbour{down}{6}{5}
+\SetDownNeighbour{down}{7}{6}
+\SetDownNeighbour{down}{8}{7}
+
+
+
+\def\SetUpRightNeighbour#1#2#3% direction -> rank -> rank -> unit
+{\SetNeighbour{#1}{a#2}{b#3}%
+ \SetNeighbour{#1}{b#2}{c#3}%
+ \SetNeighbour{#1}{c#2}{d#3}%
+ \SetNeighbour{#1}{d#2}{e#3}%
+ \SetNeighbour{#1}{e#2}{f#3}%
+ \SetNeighbour{#1}{f#2}{g#3}%
+ \SetNeighbour{#1}{g#2}{h#3}%
+ \SetNeighbour{#1}{h#2}{Offboard}}
+\let\SetDownRightNeighbour=\SetUpRightNeighbour
+\SetUpRightNeighbour{upright}{1}{2}
+\SetUpRightNeighbour{upright}{2}{3}
+\SetUpRightNeighbour{upright}{3}{4}
+\SetUpRightNeighbour{upright}{4}{5}
+\SetUpRightNeighbour{upright}{5}{6}
+\SetUpRightNeighbour{upright}{6}{7}
+\SetUpRightNeighbour{upright}{7}{8}
+\SetDownRightNeighbour{downright}{2}{1}
+\SetDownRightNeighbour{downright}{3}{2}
+\SetDownRightNeighbour{downright}{4}{3}
+\SetDownRightNeighbour{downright}{5}{4}
+\SetDownRightNeighbour{downright}{6}{5}
+\SetDownRightNeighbour{downright}{7}{6}
+\SetDownRightNeighbour{downright}{8}{7}
+
+
+
+\def\SetUpLeftNeighbour#1#2#3% direction -> rank -> rank -> unit
+{\SetNeighbour{#1}{a#2}{Offboard}%
+ \SetNeighbour{#1}{b#2}{a#3}%
+ \SetNeighbour{#1}{c#2}{b#3}%
+ \SetNeighbour{#1}{d#2}{c#3}%
+ \SetNeighbour{#1}{e#2}{d#3}%
+ \SetNeighbour{#1}{f#2}{e#3}%
+ \SetNeighbour{#1}{g#2}{f#3}%
+ \SetNeighbour{#1}{h#2}{g#3}}
+\let\SetDownLeftNeighbour=\SetUpLeftNeighbour
+\SetUpLeftNeighbour{upleft}{1}{2}
+\SetUpLeftNeighbour{upleft}{2}{3}
+\SetUpLeftNeighbour{upleft}{3}{4}
+\SetUpLeftNeighbour{upleft}{4}{5}
+\SetUpLeftNeighbour{upleft}{5}{6}
+\SetUpLeftNeighbour{upleft}{6}{7}
+\SetUpLeftNeighbour{upleft}{7}{8}
+\SetDownLeftNeighbour{downleft}{2}{1}
+\SetDownLeftNeighbour{downleft}{3}{2}
+\SetDownLeftNeighbour{downleft}{4}{3}
+\SetDownLeftNeighbour{downleft}{5}{4}
+\SetDownLeftNeighbour{downleft}{6}{5}
+\SetDownLeftNeighbour{downleft}{7}{6}
+\SetDownLeftNeighbour{downleft}{8}{7}
+
+
+\def\SetLeftNeighbour#1#2#3% direction -> file -> file -> unit
+{\SetNeighbour{#1}{#21}{#31}%
+ \SetNeighbour{#1}{#22}{#32}%
+ \SetNeighbour{#1}{#23}{#33}%
+ \SetNeighbour{#1}{#24}{#34}%
+ \SetNeighbour{#1}{#25}{#35}%
+ \SetNeighbour{#1}{#26}{#36}%
+ \SetNeighbour{#1}{#27}{#37}%
+ \SetNeighbour{#1}{#28}{#38}}
+\let\SetRightNeighbour=\SetLeftNeighbour
+\SetLeftNeighbour{left}{b}{a}
+\SetLeftNeighbour{left}{c}{b}
+\SetLeftNeighbour{left}{d}{c}
+\SetLeftNeighbour{left}{e}{d}
+\SetLeftNeighbour{left}{f}{e}
+\SetLeftNeighbour{left}{g}{f}
+\SetLeftNeighbour{left}{h}{g}
+\SetRightNeighbour{right}{a}{b}
+\SetRightNeighbour{right}{b}{c}
+\SetRightNeighbour{right}{c}{d}
+\SetRightNeighbour{right}{d}{e}
+\SetRightNeighbour{right}{e}{f}
+\SetRightNeighbour{right}{f}{g}
+\SetRightNeighbour{right}{g}{h}
+
+
+
+% the knight needs special attention
+\def\KnightSquares#1% square -> square list
+{\csname#1.knight\endcsname}
+
+\def\SetKnightSquares#1#2% square -> square list -> unit
+{\expandafter\def\csname#1.knight\endcsname{#2}}
+
+% a file
+\SetKnightSquares{a1}{\Listize[b3,c2]}
+\SetKnightSquares{a2}{\Listize[b4,c3,c1]}
+\SetKnightSquares{a3}{\Listize[b5,c4,c2,b1]}
+\SetKnightSquares{a4}{\Listize[b6,c5,c3,b2]}
+\SetKnightSquares{a5}{\Listize[b7,c6,c4,b3]}
+\SetKnightSquares{a6}{\Listize[b8,c7,c5,b4]}
+\SetKnightSquares{a7}{\Listize[c8,c6,b5]}
+\SetKnightSquares{a8}{\Listize[c7,b6]}
+% b file %Typo corrected at b6
+\SetKnightSquares{b1}{\Listize[a3,c3,d2]}
+\SetKnightSquares{b2}{\Listize[a4,c4,d3,d1]}
+\SetKnightSquares{b3}{\Listize[a5,c5,d4,d2,a1,c1]}
+\SetKnightSquares{b4}{\Listize[a6,c6,d5,d3,a2,c2]}
+\SetKnightSquares{b5}{\Listize[a7,c7,d6,d4,a3,c3]}
+\SetKnightSquares{b6}{\Listize[a8,c8,d7,d5,a4,c4]}
+\SetKnightSquares{b7}{\Listize[d8,d6,a5,c5]}
+\SetKnightSquares{b8}{\Listize[d7,a6,c6]}
+% c file
+\SetKnightSquares{c1}{\Listize[a2,b3,d3,e2]}
+\SetKnightSquares{c2}{\Listize[a1,a3,b4,d4,e3,e1]}
+\SetKnightSquares{c3}{\Listize[a2,a4,b1,b5,d1,d5,e2,e4]}
+\SetKnightSquares{c4}{\Listize[a3,a5,b2,b6,d2,d6,e3,e5]}
+\SetKnightSquares{c5}{\Listize[a4,a6,b3,b7,d3,d7,e4,e6]}
+\SetKnightSquares{c6}{\Listize[a5,a7,b4,b8,d4,d8,e5,e7]}
+\SetKnightSquares{c7}{\Listize[a6,a8,b5,d5,e6,e8]}
+\SetKnightSquares{c8}{\Listize[a7,b6,d6,e7]}
+% d file
+\SetKnightSquares{d1}{\Listize[b2,c3,e3,f2]}
+\SetKnightSquares{d2}{\Listize[b1,b3,c4,e4,f3,f1]}
+\SetKnightSquares{d3}{\Listize[b2,b4,c1,c5,e1,e5,f2,f4]}
+\SetKnightSquares{d4}{\Listize[b3,b5,c2,c6,e2,e6,f3,f5]}
+\SetKnightSquares{d5}{\Listize[b4,b6,c3,c7,e3,e7,f4,f6]}
+\SetKnightSquares{d6}{\Listize[b5,b7,c4,c8,e4,e8,f5,f7]}
+\SetKnightSquares{d7}{\Listize[b6,b8,c5,e5,f6,f8]}
+\SetKnightSquares{d8}{\Listize[b7,c6,e6,f7]}
+% e file
+\SetKnightSquares{e1}{\Listize[c2,d3,f3,g2]}
+\SetKnightSquares{e2}{\Listize[c1,c3,d4,f4,g3,g1]}
+\SetKnightSquares{e3}{\Listize[c2,c4,d1,d5,f1,f5,g2,g4]}
+\SetKnightSquares{e4}{\Listize[c3,c5,d2,d6,f2,f6,g3,g5]}
+\SetKnightSquares{e5}{\Listize[c4,c6,d3,d7,f3,f7,g4,g6]}
+\SetKnightSquares{e6}{\Listize[c5,c7,d4,d8,f4,f8,g5,g7]}
+\SetKnightSquares{e7}{\Listize[c6,c8,d5,f5,g6,g8]}
+\SetKnightSquares{e8}{\Listize[c7,d6,f6,g7]}
+% f file
+\SetKnightSquares{f1}{\Listize[d2,e3,g3,h2]}
+\SetKnightSquares{f2}{\Listize[d1,d3,e4,g4,h3,h1]}
+\SetKnightSquares{f3}{\Listize[d2,d4,e1,e5,g1,g5,h2,h4]}
+\SetKnightSquares{f4}{\Listize[d3,d5,e2,e6,g2,g6,h3,h5]}
+\SetKnightSquares{f5}{\Listize[d4,d6,e3,e7,g3,g7,h4,h6]}
+\SetKnightSquares{f6}{\Listize[d5,d7,e4,e8,g4,g8,h5,h7]}
+\SetKnightSquares{f7}{\Listize[d6,d8,e5,g5,h6,h8]}
+\SetKnightSquares{f8}{\Listize[d7,e6,g6,h7]}
+% g file
+\SetKnightSquares{g1}{\Listize[h3,f3,e2]}
+\SetKnightSquares{g2}{\Listize[h4,f4,e3,e1]}
+\SetKnightSquares{g3}{\Listize[h5,f5,e4,e2,h1,f1]}
+\SetKnightSquares{g4}{\Listize[h6,f6,e5,e3,h2,f2]}
+\SetKnightSquares{g5}{\Listize[h7,f7,e6,e4,h3,f3]}
+\SetKnightSquares{g6}{\Listize[h8,f8,e7,e5,h4,f4]}
+\SetKnightSquares{g7}{\Listize[e8,e6,h5,f5]}
+\SetKnightSquares{g8}{\Listize[h6,f6,e7]}
+% h file
+\SetKnightSquares{h1}{\Listize[g3,f2]}
+\SetKnightSquares{h2}{\Listize[g4,f3,f1]}
+\SetKnightSquares{h3}{\Listize[g5,f4,f2,g1]}
+\SetKnightSquares{h4}{\Listize[g6,f5,f3,g2]}
+\SetKnightSquares{h5}{\Listize[g7,f6,f4,g3]}
+\SetKnightSquares{h6}{\Listize[g8,f7,f5,g4]}
+\SetKnightSquares{h7}{\Listize[f8,f6,g5]}
+\SetKnightSquares{h8}{\Listize[f7,g6]}
+
+
+% StringToTokens: string -> string list, cut at spaces
+\def\StringToTokens#1%
+{\ifthenelse{\equal{#1}{}}{\Nil}{\StrToTokens(#1 )}}
+\def\StrToTokens (#1 #2){%
+ \EqStr{#1}{}%
+ {\Nil}%
+ \Cons{#1}{\EqStr{#2}{} {\Nil} {\StrToTokens(#2)}}}
+
+\def\BlackPiece#1% char -> piece
+{\EqStr{#1}{K}%
+ {k}%
+ {\EqStr{#1}{Q}%
+ {q}%
+ {\EqStr{#1}{R}%
+ {r}%
+ {\EqStr{#1}{B}%
+ {b}%
+ {\EqStr{#1}{N}%
+ {n}%
+ {p}}}}}}
+
+\def\PieceNameToPiece#1#2% piecename -> bool -> piece
+{#2{#1}{\BlackPiece{#1}}}
+
+% setting up variables for ParseMove
+\def\ParseMoveInit{%
+ \gdef\MoveToRank{Z}\gdef\MoveToFile{Z}%
+ \gdef\RankDiscriminator{Z}\gdef\FileDiscriminator{Z}%
+ \gdef\PieceNameToMove{Z}%
+ \gdef\Capture{\False}%
+ \gdef\Promotion{\False}\gdef\PromotionPieceName{Z}%
+ \gdef\Castling{\False}\gdef\LongCastling{\False}%
+ \gdef\CheckTest{}%
+ \gdef\MateTest{}%
+ \gdef\MoveRest{}}
+
+\def\ParseMove#1{% string -> unit
+ \StoreLastMove{\gdef\LastMoveString{#1}}{}% usualy only done for mainline.
+ \ParseMoveA(#1)}
+
+
+\DeclareRobustCommand{\lastmove}{{\def\variationstyle{}%
+ \styleC@on{\let\skak@ensuremath=\ensuremath}{\let\skak@ensuremath=\relax}%
+ \WhiteToMove{%
+ \addtocounter{move}{-1}%
+ \skak@ensuremath\beforenumber\arabic{move}\blackopen\skak@ensuremath%
+ \beforeblack%
+ \addtocounter{move}{1}}%
+ {\skak@ensuremath\beforenumber\arabic{move}\skak@ensuremath\whiteopen%
+ \skak@ensuremath\beforewhite}%
+ \expandafter\wmove\expandafter{\LastMoveString}}}
+
+\def\ParseMoveA(#1#2){% char -> string -> unit
+ \IsPieceName{#1}%
+ {\gdef\PieceNameToMove{\skak@pieceToEnglish{#1}}%
+ \gdef\PieceToMove{\PieceNameToPiece{\PieceNameToMove}{\WhiteToMove}}%
+ \ParseCoordinates(#2Z)%
+ \gdef\MoveTo{\MoveToFile\MoveToRank}}%
+ {\IsO{#1}%
+ {\def\Castling{\True}%
+ \ParseCastling(#2Z)}%
+ {\ParseCoordinates(#1#2Z)%
+ \gdef\MoveTo{\MoveToFile\MoveToRank}}}}
+
+\def\FirstChar(#1#2){#1}
+\def\FirstChar(#1#2){#1}
+\def\RestChars(#1#2){\gdef\@restchars{#2}}
+
+\def\ParseCoordinates(#1#2){% char -> string -> unit
+ \EqStr{Z}{#1}%
+ {}% we are done!
+ {\IsFile{#1}%
+ {\EqStr{\MoveToFile}{Z}%
+ {}% first File name in move so nothing to do
+ {\xdef\FileDiscriminator{\MoveToFile}}%
+ \gdef\MoveToFile{#1}%
+ \ParseCoordinates(#2)}%
+ {\IsRank{#1}%
+ {\EqStr{\MoveToRank}{Z}%
+ {}%
+ {\xdef\RankDiscriminator{\MoveToRank}}%
+ \gdef\MoveToRank{#1}%
+ \ParseCoordinates(#2)}%
+ {\IsCapture{#1}%
+ {\gdef\Capture{\True}%
+ \ParseCoordinates(#2)}%
+ {\IsPromotion{#1}%
+ {\gdef\Promotion{\True}%
+ \gdef\PromotionPieceName{\skak@pieceToEnglish{\FirstChar(#2)}}%
+ \RestChars(#2)% sets \@restchars
+ \expandafter\ParseCoordinates\expandafter(\@restchars)}%
+ {\EqStr{#1}{+}%
+ {\protected@xdef\CheckTest{\checksymbol}\ParseCoordinates(#2)}%
+ {\EqStr{#1}{##}%
+ {\protected@xdef\MateTest{\mate}\ParseCoordinates(#2)}%
+ {\@setmoverest(#1#2)}}}}}}}}
+
+\def\@setmoverest(#1Z){\gdef\MoveRest{#1}}
+
+
+% help for \ParseCastling
+\def\ParseCastlingA(#1#2#3){%
+ \MyEqualB{#1#2}{-O}%
+ {\gdef\LongCastling{\True}}%
+ {}}
+
+\def\ParseCastling(-O#1){% strip the first -O, at least Z is left
+ \ParseCastlingA(#1VW)}
+
+
+% for testing purposes
+\def\ShowParseInfo%
+{ %MoveTo: \MoveTo
+ MoveToRank: \MoveToRank, MoveToFile: \MoveToFile, \\
+ RankDiscriminator: \RankDiscriminator, FileDiscriminator:
+ \FileDiscriminator, \\ Promotion: \BoolToString{\Promotion},
+ PromotionPieceName: \PromotionPieceName
+ Capture: \BoolToString{\Capture}, \\
+ PieceNameToMove: \PieceNameToMove, \\
+ Castling: \BoolToString{\Castling},
+ LongCastling: \BoolToString{\LongCastling}}
+
+% castling, with preparation for eg, FisheRandom
+%\def\WhiteShortRook{h1}
+%\def\WhiteLongRook{a1}
+%\def\BlackShortRook{h8}
+%\def\WhiteLong
+\def\FirstRank#1{% bool -> rank
+ #1{1}{8}}
+\def\CastleKingFile#1{% bool -> file, LongCastling is used as argument
+ #1{c}{g}}
+\def\CastleRookToFile#1{%
+ #1{d}{f}}
+\def\CastleRookFromFile#1{%
+ #1{a}{h}}
+
+\def\CastleDone#1{% bool -> unit
+ #1{\gdef\WhiteCastling{-}}{\gdef\BlackCastling{-}}}
+
+\def\ExecuteCastling{% relies on \ParseMove
+ \stepcounter{halfmove}%
+ \gdef\MoveTo{\CastleKingFile{\LongCastling}\FirstRank{\WhiteToMove}}%
+ \ExecuteKingMove%
+ \gdef\MoveTo{\CastleRookToFile{\LongCastling}\FirstRank{\WhiteToMove}}%
+ \DoTheMove{\CastleRookFromFile{\LongCastling}\FirstRank{\WhiteToMove}}%
+ \CastleDone{\WhiteToMove}}
+
+
+%%% after ParseMove has gathered info we find the piece to move
+% LookFor looks in one direction, stopping if a non-empty square is
+% found
+\def\LookFor#1#2#3{% (piece -> bool) -> square -> direction -> square list
+ \LookForA{#1}{\GetNeighbour{#3}{#2}}{#3}} % we have to skip the
+ % first square!!!
+\def\LookForA#1#2#3{% (piece -> bool) -> square -> direction -> square list
+ #1{\Get{#2}}%
+ {\Singleton{#2}}%
+ {\EqPiece{E}{\Get{#2}}% empty square => continue in the given direction
+ {\LookForA{#1}{\GetNeighbour{#3}{#2}}{#3}}%
+ {\Nil}}}
+
+
+% IsRightPiece is true if a piece matching #1 is on square#2
+\def\IsRightPiece#1#2{% piece -> square -> bool
+ \EqPiece{#1}{\Get{#2}}}
+
+\def\IsRookQueen#1#2{% bool -> piece -> bool
+ \Or{\EqPiece{#2}{\PieceNameToPiece{R}{#1}}}%
+ {\EqPiece{#2}{\PieceNameToPiece{Q}{#1}}}%
+ }
+\def\IsBishopQueen#1#2{% bool -> piece -> bool
+ \Or{\EqPiece{#2}{\PieceNameToPiece{B}{#1}}}%
+ {\EqPiece{#2}{\PieceNameToPiece{Q}{#1}}}%
+ }
+
+% (piece-> bool) -> square -> direction list -> square list
+\def\ScanDirections#1#2#3{\Foldr{\Compose\Cat{\LookFor{#1}{#2}}}\Nil{#3}}
+
+
+% relies on the info gathered by ParseMove
+\def\FindPieceSquares#1#2{% bool -> square -> square list
+ \EqPiece{\PieceNameToMove}{R}%
+ {\ScanDirections%
+ {\EqPiece{\PieceToMove}}{#2}{\Listize[up,down,left,right]}}%
+ {\EqPiece{\PieceNameToMove}{B}%
+ {\ScanDirections%
+ {\EqPiece{\PieceToMove}}{#2}%
+ {\Listize[upright,downright,downleft,upleft]}}%
+ {\EqPiece{\PieceNameToMove}{Q}%
+ {\ScanDirections%
+ {\EqPiece{\PieceToMove}}{#2}%
+ {\Listize[up,down,left,right,upleft,upright,downleft,downright]}}%
+ {\Filter{\IsRightPiece{\PieceToMove}}{\KnightSquares{#2}}}}}}
+
+\def\UniqueMove% bool, if the descriminators <> Z
+{\LambdaAnd%
+ {\Not{\EqStr{\RankDiscriminator}{Z}}}%
+ {\Not{\EqStr{\FileDiscriminator}}{Z}}}
+
+\def\DoTheMove#1{% move the piece from #1 to \MoveToFile\MoveToRank
+ \edef\oldpiece{\Get{\MoveToFile\MoveToRank}}%
+ \Set{\MoveTo}{\Get{#1}}\Set{#1}{E}%
+ \edef\MoveFrom{#1}}
+
+\def\DoTheMoveList#1{\DoTheMove{\Head{#1}}}
+
+% undoes the move to #1
+\def\UndoMove#1{% square -> unit, relies on \oldpiece and \MoveToFile/Rank
+\Set{#1}{\Get{\MoveToFile\MoveToRank}}\Set{\MoveToFile\MoveToRank}{\oldpiece}%
+\Or{\EqPiece{\PieceToMove}{K}}{\EqPiece{\PieceToMove}{k}}%
+ {\SetKingSquare{\WhiteToMove}{#1}}%
+ {}}
+
+\def\NoEnemiesFound{% bool
+\IsNil{\Cat{\ScanDirections{\IsRookQueen{\Not\WhiteToMove}}%
+ {\KingSquare{\WhiteToMove}}{\Listize[up,down,left,right]}}%
+ {\ScanDirections{\IsBishopQueen{\Not\WhiteToMove}}%
+ {\KingSquare{\WhiteToMove}}%
+ {\Listize[upleft,downright,downleft,upright]}}}}
+
+\newboolean{helplegal}
+
+\def\LegalMove#1{% square -> bool, is the move possible to do?
+ \DoTheMove{#1}%
+ \NoEnemiesFound%
+ {\UndoMove{#1}\True}%
+ {\UndoMove{#1}\False}}%
+
+% relies on \ParseMove
+\def\TrimMoveList#1{% square -> bool
+\gdef\trimhelp{#1}%(
+\LambdaAnd{\RightRank(\trimhelp)}{\LambdaAnd{\RightFile(\trimhelp)}{\LegalMove{\trimhelp}}}}
+
+\def\ExecuteKingMove{% relies on ParseMove, WhiteToMove
+ \DoTheMove{\KingSquare{\WhiteToMove}}%
+ \SetKingSquare{\WhiteToMove}{\MoveTo}%
+ \WhiteToMove%
+ {\edef\WhiteCastling{-}}%
+ {\edef\BlackCastling{-}}}
+
+
+% used by UpdateCastling
+\def\RemoveLongCastling{% relies on \WhiteToMove
+ \WhiteToMove%
+ {\ifthenelse{\equal{KQ}{\WhiteCastling}}%
+ {\gdef\WhiteCastling{K}}%
+ {\ifthenelse{\equal{Q}{\WhiteCastling}}%
+ {\gdef\WhiteCastling{-}}%
+ {}}}%
+ {\ifthenelse{\equal{kq}{\BlackCastling}}%
+ {\gdef\BlackCastling{k}}%
+ {\ifthenelse{\equal{q}{\BlackCastling}}%
+ {\edef\BlackCastling{-}}%
+ {}}}}%
+
+
+% used by UpdateCastling
+\def\RemoveShortCastling{% relies on \WhiteToMove
+ \WhiteToMove%
+ {\ifthenelse{\equal{KQ}{\WhiteCastling}}%
+ %\EqStr{KQ}{\WhiteCastling}%
+ {\gdef\WhiteCastling{Q}}%
+ {\ifthenelse{\equal{K}{\WhiteCastling}}
+ {\gdef\WhiteCastling{-}}%
+ {}}}%
+ {\ifthenelse{\equal{kq}{\BlackCastling}}%
+ %\EqStr{kq}{\BlackCastling}%
+ {\gdef\BlackCastling{q}}%
+ {\EqStr{k}{\BlackCastling}%
+ {\gdef\BlackCastling{-}}%
+ {}}}}
+
+\def\UpdateCastling{% relies on \ParseMove
+ \EqPiece{R}{\PieceNameToMove}%
+ {\EqSquare{\MoveFrom}{\CastleRookFromFile{\True}\FirstRank{\WhiteToMove}}%
+ {\RemoveLongCastling}%
+ {\EqSquare{\MoveFrom}{\CastleRookFromFile{\False}\FirstRank{\WhiteToMove}}%
+ {\RemoveShortCastling}%
+ {}}}%
+ {}}% non rook moves will not change the castling possibilities
+
+\def\ExecutePieceMove{% relies on the info gathered by ParseMove
+ \Capture{\setcounter{halfmove}{0}}{\stepcounter{halfmove}}%
+ \UniqueMove%
+ {\DoTheMove{\FileDiscriminator\RankDiscriminator}}%
+ {\EqPiece{K}{\PieceNameToMove}%
+ {\ExecuteKingMove}%
+ {%
+% (\Unlistize{\FindPieceSquares{\WhiteToMove}{\MoveTo}},%
+% \Unlistize{\Filter{\TrimMoveList}%
+% {\FindPieceSquares{\WhiteToMove}{\MoveTo}}})%
+ \Apply{\DoTheMove}{\Filter{\TrimMoveList}%
+ {\FindPieceSquares{\WhiteToMove}{\MoveTo}}}}%
+ }%
+ \UpdateCastling}
+
+\def\FromRank{%
+ \EqStr{1}{\MoveToRank}%
+ {\WhiteToMove{0}{2}}%
+ {\EqStr{2}{\MoveToRank}%
+ {\WhiteToMove{1}{3}}%
+ {\EqStr{3}{\MoveToRank}%
+ {\WhiteToMove{2}{4}}%
+ {\EqStr{4}{\MoveToRank}%
+ {\WhiteToMove{3}{5}}%
+ {\EqStr{5}{\MoveToRank}%
+ {\WhiteToMove{4}{6}}%
+ {\EqStr{6}{\MoveToRank}%
+ {\WhiteToMove{5}{7}}%
+ {\EqStr{7}{\MoveToRank}%
+ {\WhiteToMove{6}{8}}%
+ {\EqStr{8}{\MoveToRank}%
+ {\WhiteToMove{7}{9}}%
+ {}}}}}}}}}
+\def\InitialRank{\WhiteToMove{2}{7}}
+
+% \def\ExecutePawnMove{% relies on the info obtained by ParseMove
+% \setcounter{halfmove}{0}%
+% \Capture%
+% {\EqPiece{E}{\Get{\MoveTo}}%
+% {\Set{\MoveToFile\FromRank}{E}}%
+% {}%
+% \DoTheMove{\FileDiscriminator\FromRank}%
+% \xdef\EnPassantSquare{-}}%
+% {\EqPiece{E}{\Get{\MoveToFile\FromRank}}%
+% {\xdef\EnPassantSquare{\MoveToFile\FromRank}% two square move
+% \DoTheMove{\MoveToFile\InitialRank}}%
+% {\xdef\EnPassantSquare{-}%
+% \DoTheMove{\MoveToFile\FromRank}% one square move
+% }}%
+% \Promotion%
+% {\Set{\MoveTo}{\PieceNameToPiece{\PromotionPieceName}{\WhiteToMove}}}%
+% {}}
+
+% Bug-fix for longmove
+\def\ExecutePawnMove{% relies on the info obtained by ParseMove
+ \setcounter{halfmove}{0}%
+ \Capture%
+ {\EqPiece{E}{\Get{\MoveTo}}%
+ {\Set{\MoveToFile\FromRank}{E}}%
+ {}%
+ \xdef\PawnFrom{\FileDiscriminator\FromRank}%
+ \DoTheMove{\PawnFrom}%
+ \xdef\EnPassantSquare{-}}%
+ {\EqPiece{E}{\Get{\MoveToFile\FromRank}}%
+ {\xdef\EnPassantSquare{\MoveToFile\FromRank}% two square move
+ \xdef\PawnFrom{\MoveToFile\InitialRank}%
+ \DoTheMove{\PawnFrom}}%
+ {\xdef\EnPassantSquare{-}%
+ \xdef\PawnFrom{\MoveToFile\FromRank}%
+ \DoTheMove{\PawnFrom}% one square move
+ }}%
+ \Promotion%
+ {\Set{\MoveTo}{\PieceNameToPiece{\PromotionPieceName}{\WhiteToMove}}}%
+ {}}
+
+
+
+\def\MakeMove#1{% string -> unit
+ \ParseMoveInit%
+ \ParseMove{#1}%
+ % check if there is a piece of own colour on \MoveToFile\MoveToRank
+ % THIS CHECK HAS TO BE IMPLEMENTED!
+ \ExecuteMoves%
+ {\EqPiece{Z}{\PieceNameToMove}%
+ {\Castling%
+ {\gdef\EnPassantSquare{-}\ExecuteCastling}%
+ {\ExecutePawnMove}}%
+ {\gdef\EnPassantSquare{-}%
+ \ExecutePieceMove}%
+ \WhiteToMove%
+ {\gdef\WhiteToMove{\False}}%
+ {\gdef\WhiteToMove{\True}\addtocounter{move}{1}}}%
+ {}% moves are not executed
+ \printmove}
+
+
+\def\mainline{\begingroup\catcode`\#=12 \@mainline}
+% \def\@mainline#1{\endgroup\gdef\NumberNext{\True}%
+% \gdef\AfterBlack{\False}%
+% \gdef\PrintMoves{\True}%
+% \gdef\ExecuteMoves{\True}%
+% \gdef\StoreLastMove{\True}%
+% {\mainlinestyle\opencommands%
+% \Mainline(#1 Z )%
+% \closecommands}}
+
+% new version of @mainline
+\def\@mainline#1{\endgroup\gdef\NumberNext{\True}%
+ \let\currentstyle=\mainlinestyle%
+ \gdef\PrintMoves{\True}%
+ \gdef\ExecuteMoves{\True}%
+ \gdef\StoreLastMove{\True}%
+ \@restoremainline%
+ \runmoves{#1}%
+ \@storemainline}
+
+\def\@restoremainline{%
+ \@restoregame{skak.mainline.previous}%
+ \@storegame{skak.temp.previous}%
+ \@restoregame{skak.mainline}}
+
+
+\def\hidemoves{\begingroup\catcode`\#=12 \@hidemoves}
+% \def\@hidemoves#1{\endgroup\gdef\NumberNext{\True}%
+% \gdef\AfterBlack{\False}%
+% \gdef\PrintMoves{\False}%
+% \gdef\ExecuteMoves{\True}%
+% \gdef\StoreLastMove{\True}% just in case you want to refer to the last move.
+% {\relax@typesetting%
+% \Mainline(#1 Z )}}
+
+% new version af @hidemoves
+\def\@hidemoves#1{\endgroup\gdef\NumberNext{\True}%
+ \gdef\PrintMoves{\False}%
+ \gdef\ExecuteMoves{\True}%
+ \gdef\StoreLastMove{\True}% just in case you want to refer to the last move.
+ \let\currentstyle=\relax@typesetting%
+ \@restoremainline%
+ \runmoves{#1}%
+ \@storemainline}
+
+
+\newcounter{helpnumber}
+\newcounter{helpnumberMove}
+
+\def\EatNumber#1{%
+ \setcounter{helpnumberMove}{\arabic{move}}%
+ \setcounter{helpnumber}{0}%
+ \AfterBlack{\afterblack}{}%
+ \gdef\AfterBlack{\True}%
+ \beforenumber\EatNumberA(#1WXYZ)}
+
+\def\EatNumberA(#1.#2){%
+ \PrintMoves{#1}{}%
+ \ExecuteMoves%
+ {\setcounter{helpnumber}{#1}%
+ \ifthenelse{\value{helpnumberMove}=\value{helpnumber}}%
+ {\LookForMove(.#2)}% sets \ExpectedColour and \CurrentMove
+ {\errmessage{mainline: #1 is not the correct move number}}}%
+ {\LookForMove(.#2)}%
+}
+
+
+
+\def\LookForMove(#1#2#3#4){%
+ \EqStr{.}{#2}% ... after the move number
+ {\blackopen%
+ \gdef\AfterWhite{\False}%
+ \gdef\ExpectedColour{\False}%
+ \HandleMove(#4)}%
+ {\whiteopen%
+ \gdef\AfterWhite{\True}%
+ \gdef\ExpectedColour{\True}%
+ \HandleMove(#2#3#4)}}%
+
+
+\def\HandleMove(#1XYZ){% executes move if one is found
+ \EqStr{W}{#1}%
+ {\gdef\NumberNext{\False}}%
+ {\StripMove(#1)}}
+\def\StripMove(#1W){% handles things like 1.e4
+ \@storegame{skak.temp.previous}% store the previous position
+ % TO-DO: need a more effective way of going a move back.
+ \MakeMoveMainline{#1}}
+
+% The tricky part! Has to integrate \typeset@A@move
+\def\MakeMoveMainline#1{%
+ {\ExpectedColour%
+ {\WhiteToMove%
+ {\MakeMove{#1}%
+ \gdef\ExpectedColour{\False}%
+ \gdef\NumberNext{\False}}%
+ {\errmessage{mainline: black, not white, to move (#1)}}}%
+ {\WhiteToMove%
+ {\errmessage{mainline: white, not black, to move (#1)}}%
+ {\MakeMove{#1}\gdef\NumberNext{\True}}}}}
+
+
+\def\MakeMoveMainline#1{%
+ \ExecuteMoves%
+ {\ExpectedColour%
+ {\WhiteToMove{}{\errmessage{mainline: black, not white, to move (#1)}}}%
+ {\WhiteToMove{\errmessage{mainline: white, not black, to move (#1)}}{}}}
+ {}%
+ % regardless of the moves are executed or not:
+ \ExpectedColour%
+ {\beforewhite\MakeMove{#1}%
+ \gdef\ExpectedColour{\False}%
+ \gdef\NumberNext{\False}}%
+ {\AfterWhite{\afterwhite}{}%
+ \beforeblack\MakeMove{#1}\gdef\NumberNext{\True}}}
+
+
+% \def\Mainline(#1 #2){%
+% \EqStr{ }{#1}%
+% {\Mainline(#2)}%
+% {%
+% \EqStr{Z}{#1}%
+% {}%
+% {\NumberNext%
+% {\EatNumber{#1}% sets \NumberOK, \ExpectedColour
+% % executes a move not separated from the
+% % number with a space, eg, 1.e4
+% %{\gdef\NumberNext{\False}\Mainline(#2)}%
+% %\gdef\NumberNext{\False}%
+% \Mainline(#2)}%
+% {\MakeMoveMainline{#1}%
+% \Mainline(#2)}}}}
+
+% New version for longmoves in variation
+\def\Mainline(#1 #2){%
+ \EqStr{ }{#1}%
+ {\Mainline(#2)}%
+ {%
+ \EqStr{Z}{#1}%
+ {}%
+ {\NumberNext%
+ {\EatNumber{#1}% sets \NumberOK, \ExpectedColour
+ % executes a move not separated from the
+ % number with a space, eg, 1.e4
+ % {\gdef\NumberNext{\False}\Mainline(#2)}%
+ %\gdef\NumberNext{\False}%
+ \Mainline(#2)}%
+ {\@storegame{skak.temp.previous}% store the previous position
+ % TO-DO: need a more effective way of going a move back.
+ \MakeMoveMainline{#1}%
+ \Mainline(#2)}}}}
+
+
+%%%%% typesetting
+
+% depends on the info gathered by \ParseMove
+\def\printmove@san{%
+ \EqPiece{Z}{\PieceNameToMove}%
+ {\Castling%
+ {\LongCastling{\castlingchar\castlinghyphen}{}%
+ \castlingchar\castlinghyphen\castlingchar}%
+ {%pawn move
+ \Capture{\FileDiscriminator\capturesymbol}{}%
+ \MoveToFile\MoveToRank%
+ \Promotion{\cfss@textsymfigsymbol{\PromotionPieceName}}{}}}%
+ {% piece move
+ \cfss@textsymfigsymbol{\PieceNameToMove}%
+ \EqStr{Z}{\FileDiscriminator}{}{\FileDiscriminator}%
+ \EqStr{Z}{\RankDiscriminator}{}{\RankDiscriminator}%
+ \Capture{\capturesymbol}{}%
+ \MoveToFile\MoveToRank}%
+ % for all moves:
+ \CheckTest\MateTest\MoveRest}
+
+\DeclareRobustCommand{\movehyphen}{-}
+
+% depends on the info gathered by \ParseMove
+\def\printmove@algebraic{%
+ \EqPiece{Z}{\PieceNameToMove}%
+ {\Castling%
+ {\LongCastling{\castlingchar\castlinghyphen}{}%
+ \castlingchar\castlinghyphen\castlingchar}%
+ {%pawn move
+ \MoveFrom%
+ \Capture{\capturesymbol}{\movehyphen}%
+ \MoveToFile\MoveToRank%
+ \Promotion{\cfss@textsymfigsymbol{\PromotionPieceName}}{}}}%
+ {% piece move
+ \cfss@textsymfigsymbol{\PieceNameToMove}%
+ \MoveFrom%
+ \Capture{\capturesymbol}{\movehyphen}%
+ \MoveToFile\MoveToRank}%
+ % for all moves:
+ \CheckTest\MateTest\MoveRest}
+
+\def\longmoves{%
+\let\printmove=\printmove@algebraic}
+
+\def\shortmoves{%
+\let\printmove=\printmove@san}
+
+\shortmoves% this is default
+
+\def\relax@typesetting{%
+\let\opencommands=\relax
+\let\closecommands=\relax
+\let\whiteopen=\relax
+\let\blackopen=\relax
+\let\beforenumber=\relax
+\let\beforewhite=\relax
+\let\afterwhite=\relax
+\let\beforeblack=\relax
+\let\afterblack=\relax
+\let\printmove=\relax
+}
+
+\def\styleA@opencommands{}
+\def\styleA@closecommands{}
+\def\styleA@whiteopen{.}
+\def\styleA@blackopen{. -}
+\def\styleA@beforenumber{}
+\def\styleA@beforewhite{ }
+\def\styleA@afterwhite{}
+\def\styleA@beforeblack{, }
+\def\styleA@afterblack{ }
+
+\def\styleA{%
+\let\opencommands=\styleA@opencommands
+\let\closecommands=\styleA@closecommands
+\let\whiteopen=\styleA@whiteopen
+\let\blackopen=\styleA@blackopen
+\let\beforenumber=\styleA@beforenumber
+\let\beforewhite=\styleA@beforewhite
+\let\afterwhite=\styleA@afterwhite
+\let\beforeblack=\styleA@beforeblack
+\let\afterblack=\styleA@afterblack
+\leavestylec
+}
+
+
+\def\styleB@opencommands{}
+\def\styleB@closecommands{}
+\def\styleB@whiteopen{ }
+\def\styleB@blackopen{\ldots}
+\def\styleB@beforenumber{}
+\def\styleB@beforewhite{}
+\def\styleB@afterwhite{ }
+\def\styleB@beforeblack{}
+\def\styleB@afterblack{ }
+
+
+\def\styleB{%
+\let\opencommands=\styleB@opencommands
+\let\closecommands=\styleB@closecommands
+\let\whiteopen=\styleB@whiteopen
+\let\blackopen=\styleB@blackopen
+\let\beforenumber=\styleB@beforenumber
+\let\beforewhite=\styleB@beforewhite
+\let\afterwhite=\styleB@afterwhite
+\let\beforeblack=\styleB@beforeblack
+\let\afterblack=\styleB@afterblack
+\leavestylec
+}
+
+% avoiding problems with switch from styleC to other styles
+% problem reported by Joao Nabais
+\newcommand{\leavestylec}{%
+ \styleC@on{\normalstyles}{\relax}%
+ \def\styleC@on{\False}%
+}
+
+\def\styleC@opencommands{%
+ \begin{tabbing}%
+ \hspace{.2\linewidth}\=\hspace{.2\linewidth}\=%
+ \hspace{.2\linewidth}\= \kill}
+\def\styleC@closecommands{\end{tabbing}}
+\def\styleC@whiteopen{}
+\def\styleC@blackopen{\>\ldots}
+\def\styleC@beforenumber{\>}
+\def\styleC@beforewhite{\>}
+\def\styleC@afterwhite{}
+\def\styleC@beforeblack{\>}
+\def\styleC@afterblack{\\}
+
+
+\def\styleC{%
+\let\opencommands=\styleC@opencommands%
+\let\closecommands=\styleC@closecommands%
+\let\whiteopen=\styleC@whiteopen%
+\let\blackopen=\styleC@blackopen%
+\let\beforenumber=\styleC@beforenumber%
+\let\beforewhite=\styleC@beforewhite%
+\let\afterwhite=\styleC@afterwhite%
+\let\beforeblack=\styleC@beforeblack%
+\let\afterblack=\styleC@afterblack%
+\def\mainlinestyle{\styleC\bfseries}%
+\def\variationstyle{\styleB}%
+\def\styleC@on{\True}%
+}
+
+\def\mainlinestyle{\bfseries}% could also contain
+ % definitions of the
+ % various style options
+\def\variationstyle{}% as with mainlinestyle
+
+%\typeset@number is isomorf with \EatNumber
+\def\typeset@number#1{\TypeSetAfterBlack{\afterblack}{}%
+ \gdef\TypeSetAfterBlack{\True}%
+ \beforenumber\typeset@numberA(#1WXYZ)}% 22: -> 22\?open
+\def\typeset@numberA(#1.#2){%
+ #1\typeset@numberHandlePeriods(.#2)}
+\def\typeset@numberHandlePeriods(#1#2#3#4){%
+ \EqStr{.}{#2}% ... after the number
+ {\blackopen\gdef\TypeSetColour{\False}\gdef\TypeSetAfterWhite{\False}%
+ \typeset@numberHandleMove(#4)}%
+ {\whiteopen\gdef\TypeSetColour{\True}\gdef\TypeSetAfterWhite{\True}%
+ \typeset@numberHandleMove(#2#3#4)}}
+\def\typeset@numberHandleMove(#1XYZ){%
+ \EqStr{W}{#1}%
+ {\gdef\TypeSetNumberNext{\False}}% HERE
+ {\typeset@numberStripMove(#1)}}
+\def\typeset@numberStripMove(#1W){%
+ \typeset@A@move{#1}}
+
+\def\typeset@A@move#1{%
+ \TypeSetColour%
+ {\beforewhite\mbox{\typeset@A@moveA(#1Z)}%
+ \gdef\TypeSetColour{\False}%
+ \gdef\TypeSetNumberNext{\False}}% addition
+ {\TypeSetAfterWhite{\afterwhite}{}%
+ \beforeblack\mbox{\typeset@A@moveA(#1Z)}%
+ \gdef\TypeSetColour{\True}\gdef\TypeSetNumberNext{\True}}}
+
+\def\typeset@A@moveA(#1#2){%
+ \EqStr{Z}{#1}%
+ {}%
+ {\IsPieceName{#1}%
+ {\xdef\temp@piece{\skak@pieceToEnglish{#1}}%
+ \expandafter\cfss@textsymfigsymbol\temp@piece}%
+ {\EqStr{=}{#1}%
+ {}%
+ {\EqStr{x}{#1}%
+ {\capturesymbol}% %%changed UF
+ {\EqStr{+}{#1}%
+ {\checksymbol}% was "\ensuremath{\dagger}" before
+ {\EqStr{-}{#1}%
+ {\LastCharWasCastle
+ {\castlinghyphen}% %%changed UF, dash from Textfont short dash for castlings
+ {\hbox{--}}}% longer dash for moves
+ {\EqStr{O}{#1}%
+ {\gdef\LastCharWasCastle{\True}%
+ \castlingchar}% %% UF added to be able to change from O to 0
+ {\gdef\LastCharWasCastle{\False}%
+ \EqStr{##}{#1}%added 2004.04.14 for \mate
+ {\mate}
+ {#1}}}}}}}%
+ \typeset@A@moveA(#2)}}
+
+
+\def\typeset@A#1{\gdef\TypeSetNumberNext{\True}%
+ \gdef\TypeSetAfterBlack{\False}\opencommands\typeset@AA(#1 Z )%
+ \closecommands}
+% \typeset@AA is isomorf with \Mainline
+\def\typeset@AA(#1 #2){%
+ \EqStr{ }{#1}%
+ {\typeset@AA(#2)}%
+ {\EqStr{Z}{#1}%
+ {}%
+ {\TypeSetNumberNext%
+ {\typeset@number{#1}% sets \TypeSetColour
+ % \gdef\TypeSetNumberNext{\False}%
+ \typeset@AA(#2)}%
+ {\typeset@A@move{#1}%
+ \typeset@AA(#2)}}}}
+
+% \typeset@cmoves and \typeset@comment added by db <2002-01-06>
+\def\movewhite{ }
+
+\def\typeset@cmoves(#1 #2){%
+ \EqStr{ }{#1}%
+ {\typeset@cmoves(#2)}%
+ {\EqStr{Y}{#1}%
+ {}%
+ {\typeset@A@moveA(#1Z)\movewhite\typeset@cmoves(#2)}}}
+
+\def\typeset@comment#1{\opencommands\typeset@cmoves(#1 Y )%
+ \closecommands}
+
+%\def\variation{\begingroup\catcode`\#=12 \@variation}
+\DeclareRobustCommand{\variation}{\begingroup\catcode`\#=12 \@variation}
+%\def\@variation#1{\endgroup{\variationstyle\typeset@A{#1}}}
+\DeclareRobustCommand{\variationcurrent}{\begingroup\catcode`\#=12 \@variationcurrent}
+\DeclareRobustCommand{\continuevariation}{\begingroup\catcode`\#=12 \@continuevariation}
+\DeclareRobustCommand{\continuevariationcurrent}{\begingroup\catcode`\#=12 \@continuevariationcurrent}
+
+% \def\@variation#1{\endgroup\gdef\NumberNext{\True}%
+% \gdef\AfterBlack{\False}%
+% \gdef\PrintMoves{\True}%
+% \gdef\ExecuteMoves{\False}%
+% \gdef\StoreLastMove{\False}%
+% {\variationstyle\opencommands%
+% \Mainline(#1 Z )%
+% \closecommands}}
+
+% new version of \@variation
+\def\@variation#1{\endgroup%
+ \let\currentstyle=\variationstyle%
+ \gdef\PrintMoves{\True}%
+ \gdef\ExecuteMoves{\True}%
+ \gdef\StoreLastMove{\False}%
+ \@restoregame{skak.mainline.previous}% roll-back of last move.
+ \runmoves{#1}%
+ \storegame{skak.variation}\@restoremainline}
+
+% \def\@storevariationdata{%
+% \storegame{skak.variation}%
+% \restoregame{skak.temp.previous}%
+% \storegame{skak.variation.previous}}
+
+\def\@storemainline{% Only to be called after executing moves in \@mainline
+% or in \@hidemoves!
+ \@storegame{skak.mainline}%
+ \@restoregame{skak.temp.previous}%
+ \@storegame{skak.mainline.previous}%
+ \@restoregame{skak.mainline}}
+
+\def\@variationcurrent#1{\endgroup%
+ \let\currentstyle=\variationstyle%
+ \gdef\PrintMoves{\True}%
+ \gdef\ExecuteMoves{\True}%
+ \gdef\StoreLastMove{\False}%
+ \@restoregame{skak.mainline}%
+ \runmoves{#1}%
+ \storegame{skak.variation}\@restoremainline}
+
+\def\@continuevariation#1{\endgroup%
+ \let\currentstyle=\variationstyle%
+ \gdef\PrintMoves{\True}%
+ \gdef\ExecuteMoves{\True}%
+ \gdef\StoreLastMove{\False}%
+ \@restoregame{skak.variation.previous}% roll-back of last move.
+ \runmoves{#1}%
+ \storegame{skak.variation}\@restoremainline}
+
+
+\def\@continuevariationcurrent#1{\endgroup%
+ \let\currentstyle=\variationstyle%
+ \gdef\PrintMoves{\True}%
+ \gdef\ExecuteMoves{\True}%
+ \gdef\StoreLastMove{\False}%
+ \@restoregame{skak.variation}%
+ \runmoves{#1}%
+ \storegame{skak.variation}\@restoremainline}
+
+
+
+
+% \runmoves is common to \variation, \mainline and \hidemoves
+\newcommand\runmoves[1]{%
+ \gdef\NumberNext{\True}%
+ \gdef\AfterBlack{\False}%
+ {\currentstyle\opencommands%
+ \Mainline(#1 Z )%
+ \closecommands}}
+
+% typesetting moves without move number
+\def\wmove{\begingroup\catcode`\#=12 \@wmove}
+\def\@wmove#1{\endgroup{\variationstyle\typeset@A@moveA(#1Z)}}
+\def\bmove{\begingroup\catcode`\#=12 \@bmove}
+\def\@bmove#1{\endgroup{\variationstyle\ldots\typeset@A@moveA(#1Z)}}
+
+% \movecomment added by db <2002-01-06>
+\def\movecomment{\begingroup\catcode`\#=12 \@movecomment}
+\def\@movecomment#1{\endgroup{\variationstyle\typeset@comment{#1}}}
+
+%%%
+% printing of the board
+\newlength{\squarelength}
+%% Multiplier for the special PS markers, see set@special@psmarkers
+\newcount\square@multiplier
+\newlength{\ranklift}
+
+
+
+%%% 2004.04.09 UF: removed pt so bigger board are possible
+%%% 2004.04.05 UF: group around the font-changing-command
+%%% UF 2005.03.24 changes to use chessfss size changing commands
+\def\setup@showboard{% UF 2005.03.24 don't need argument. Sizes should be set before.
+ \settowidth\squarelength{\BlackEmptySquare}%
+ \square@multiplier=\squarelength% in sp
+ \divide\square@multiplier by 65536% in pt
+ % ps setup
+ \ps@on{\psset{unit=\the\squarelength}}{}
+ %% put a group around font-changing-command UF:
+ {\sidefont\setlength{\@tempdima}{.5\squarelength-0.8ex}
+ \xdef\aftergrouplength{\the\@tempdima}%
+ \aftergroup\setlength\aftergroup\ranklift%
+ \aftergroup{\aftergroup\aftergrouplength\aftergroup}}}
+
+
+\def\tinyboard{\cfss@setupboardsize{10pt}{6pt}\setup@showboard}
+\def\smallboard{\cfss@setupboardsize{15pt}{8pt}\setup@showboard}
+\def\normalboard{\cfss@setupboardsize{20pt}{10pt}\setup@showboard}
+\def\largeboard{\cfss@setupboardsize{30pt}{12pt}\setup@showboard}
+
+%new 2005.06.29 UF
+\newcommand\setupboard[2]{%
+ \cfss@setupboardsize{#1}{#2}%#1 board, #2 notation
+ \setup@showboard}
+
+% the default
+\normalboard
+
+\def\ToggleWhiteSquare{%
+ \WhiteSquare{\def\WhiteSquare{\False}}{\def\WhiteSquare{\True}}}
+
+%\def\WhiteSquarePiece#1{%
+% \EqPiece{E}{#1}{0}{#1}}
+
+% getting around deficiencies in some fonts
+\def\WhiteSquarePiece#1{%
+ \EqPiece{E}{#1}{\WhiteEmptySquare}{#1}}
+
+
+% for fonts without an empty square one can use
+%\renewcommand\WhiteEmptySquare}{{\rule{\squarelength}{0pt}}}
+
+
+\def\BlackSquarePiece#1{%
+ \EqPiece{E}{#1}{Z}%
+ {\EqPiece{P}{#1}{O}%
+ {\EqPiece{p}{#1}{o}%
+ {\EqPiece{R}{#1}{S}%
+ {\EqPiece{r}{#1}{s}%
+ {\EqPiece{N}{#1}{M}%
+ {\EqPiece{n}{#1}{m}%
+ {\EqPiece{B}{#1}{A}%
+ {\EqPiece{b}{#1}{a}%
+ {\EqPiece{Q}{#1}{L}%
+ {\EqPiece{q}{#1}{l}%
+ {\EqPiece{K}{#1}{J}{j}}}}}}}}}}}}}
+
+\def\FilterShowOnly#1{% piece -> piece, shows only the pieces in
+ % ShowOnlyList
+ \Member{\EqStr}{#1}{\ShowOnlyList}%
+ {#1}{E}}
+
+
+\def\Showchar#1{% square -> drawn square
+ \WhiteSquare%
+ {\WhiteSquarePiece{\Compose\FilterShowOnly\Get{#1}}}%
+ {\BlackSquarePiece{\Compose\FilterShowOnly\Get{#1}}}%
+ \ToggleWhiteSquare}
+
+\def\Showrank#1{% rank -> drawn rank
+ \boardfont\Apply{\Showchar}{\Rank{#1}}%
+ \ifnum#1=1\ps@on{\pnode(-.5,.5){BM}}{}\fi}
+
+\def\ShowrankInverse#1{% rank -> drawn rank
+ \boardfont\Apply{\Showchar}{\Reverse{\Rank{#1}}}%
+ \ifnum#1=8\ps@on{\pnode(-.5,.5){BM}}{}\fi}
+
+\def\ShowMoverWhiteNormal{\pscustom{\skak@translate{h}{1}%
+\psline{->}(1,0.25)(1,0.8)%
+\psframe(0.84,-0.16)(1.16,0.16)}}
+
+\def\ShowMoverBlackNormal{%
+ \pscustom[fillstyle=solid,fillcolor=gray]{\skak@translate{h}{8}%
+ \psline{->}(1,-0.25)(1,-0.8)%
+ \psframe(0.84,-0.16)(1.16,0.16)}}
+
+\def\ShowMoverWhiteInverse{\pscustom{\skak@translate{a}{1}%
+\psline{->}(1,-0.25)(1,-0.8)%
+\psframe(0.84,-0.16)(1.16,0.16)}}
+
+\def\ShowMoverBlackInverse{%
+ \pscustom[fillstyle=solid,fillcolor=gray]{\skak@translate{a}{8}%
+ \psline{->}(1,0.25)(1,0.8)%
+ \psframe(0.84,-0.16)(1.16,0.16)}}
+
+\def\show@board{%
+ \def\WhiteSquare{\True}%
+ \leavevmode%
+ \vbox{\offinterlineskip%
+ \hrule height1pt%
+ \hbox{\vrule width1pt%
+ \vbox{\hbox{\Showrank{8}}\ToggleWhiteSquare%
+ \hbox{\Showrank{7}}\ToggleWhiteSquare%
+ \hbox{\Showrank{6}}\ToggleWhiteSquare%
+ \hbox{\Showrank{5}}\ToggleWhiteSquare%
+ \hbox{\Showrank{4}}\ToggleWhiteSquare%
+ \hbox{\Showrank{3}}\ToggleWhiteSquare%
+ \hbox{\Showrank{2}}\ToggleWhiteSquare%
+ \hbox{\Showrank{1}}}%
+ \vrule width1pt}%
+ \hrule height1pt}%
+ \setcounter{ps@inverse}{0}%
+ \ShowMover%
+ {\WhiteToMove%
+ {\ShowMoverWhiteNormal}%
+ {\ShowMoverBlackNormal}}%
+ {}%
+}
+
+\def\show@board@inverse{%
+ \leavevmode%
+ \def\WhiteSquare{\True}%
+ \vbox{\offinterlineskip%
+ \hrule height1pt%
+ \hbox{\vrule width1pt%
+ \vbox{\hbox{\ShowrankInverse{1}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverse{2}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverse{3}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverse{4}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverse{5}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverse{6}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverse{7}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverse{8}}}%
+ \vrule width1pt}%
+ \hrule height1pt}%
+ \setcounter{ps@inverse}{180}%
+ \ShowMover%
+ {\WhiteToMove%
+ {\ShowMoverWhiteInverse}%
+ {\ShowMoverBlackInverse}}%
+ {}%
+}
+
+\def\ShowrankNumber#1{%
+\makebox[0pt][r]{%
+ \raisebox{\ranklift}[0cm][0cm]{%
+ \makebox[\squarelength][r]{\sidefont#1\hspace*{.1\squarelength}}}}}
+
+\def\ShowrankWithNumber#1{\ShowrankNumber{#1}%
+\vrule width1pt \Showrank{#1}\vrule width1pt}
+
+\def\ShowrankInverseWithNumber#1{\ShowrankNumber{#1}%
+ \vrule width1pt\ShowrankInverse{#1}\vrule width1pt}
+
+
+\def\Showfile#1{\hbox to \squarelength{\hfil\sidefont#1\hfil}}
+\def\Showfiles{\hfil\Showfile{a}\Showfile{b}\Showfile{c}\Showfile{d}%
+ \Showfile{e}\Showfile{f}\Showfile{g}\Showfile{h}\hfil}
+\def\Showfiles@inverse{\hfil\Showfile{h}\Showfile{g}\Showfile{f}\Showfile{e}%
+ \Showfile{d}\Showfile{c}\Showfile{b}\Showfile{a}\hfil}
+
+%%% changed
+\def\show@board@notation{%
+ \def\WhiteSquare{\True}%
+ \leavevmode%
+ \vbox{\offinterlineskip%
+ \hrule height1pt%
+ \hbox{\ShowrankWithNumber{8}}\ToggleWhiteSquare%
+ \hbox{\ShowrankWithNumber{7}}\ToggleWhiteSquare%
+ \hbox{\ShowrankWithNumber{6}}\ToggleWhiteSquare%
+ \hbox{\ShowrankWithNumber{5}}\ToggleWhiteSquare%
+ \hbox{\ShowrankWithNumber{4}}\ToggleWhiteSquare%
+ \hbox{\ShowrankWithNumber{3}}\ToggleWhiteSquare%
+ \hbox{\ShowrankWithNumber{2}}\ToggleWhiteSquare%
+ \hbox{\ShowrankWithNumber{1}}\ToggleWhiteSquare%
+ \hrule height1pt%
+ \vspace*{.1\squarelength}%
+ \hbox{\Showfiles}}%
+ \setcounter{ps@inverse}{0}%
+ \ShowMover%
+ {\WhiteToMove%
+ {\ShowMoverWhiteNormal}%
+ {\ShowMoverBlackNormal}}%
+ {}%
+}
+
+\def\show@board@notation@inverse{%
+ \def\WhiteSquare{\True}%
+ \leavevmode%\rule{\squarelength}{0pt}%\hspace*{-\squarelength}%
+ \vbox{\offinterlineskip%
+ \hrule height1pt%
+ \hbox{\ShowrankInverseWithNumber{1}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverseWithNumber{2}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverseWithNumber{3}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverseWithNumber{4}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverseWithNumber{5}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverseWithNumber{6}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverseWithNumber{7}}\ToggleWhiteSquare%
+ \hbox{\ShowrankInverseWithNumber{8}}\ToggleWhiteSquare%
+ \hrule height1pt%
+ \vspace*{.1\squarelength}%
+ \hbox{\Showfiles@inverse}}%
+ \setcounter{ps@inverse}{180}%
+ \ShowMover%
+ {\WhiteToMove%
+ {\ShowMoverWhiteInverse}%
+ {\ShowMoverBlackInverse}}%
+ {}%
+}
+
+% on the fly configuration
+\def\notationOn{\let\showboard=\show@board@notation%
+ \let\showinverseboard=\show@board@notation@inverse}
+\def\notationOff{\let\showboard=\show@board%
+ \let\showinverseboard=\show@board@inverse}
+
+\def\notationon{\notationOn}
+\def\notationoff{\notationOff}
+
+\def\showmoverOn{\def\ShowMover{\True}}
+\def\showmoverOff{\def\ShowMover{\False}}
+
+\def\showmoveron{\showmoverOn}
+\def\showmoveroff{\showmoverOff}
+
+\def\newgame{%
+ \fenboard{rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1}}
+
+% Stores the initial boards for board manipulation.
+\def\@initstorage{%
+ \@storegame{skak.mainline}%
+ \@storegame{skak.mainline.previous}% no previous move for starters.
+ \@storegame{skak.temp.previous}}
+
+
+%%%% storing and loading of games
+\newtoks\store@toks
+\def\savegame#1{% writes the board as fen to #1.fen
+ \newwrite\skakstore%
+ \immediate\openout\skakstore=#1.fen%
+ \Fen@calculate%
+ \immediate\write\skakstore{\temp@board}%
+ \immediate\closeout\skakstore}
+
+\def\savegame#1{% writes the board as fen to #1.fen
+ \immediate\openout0=#1.fen%
+ \Fen@calculate%
+ \immediate\write0{\temp@board}%
+ \immediate\closeout0}
+
+
+
+% loading a board from a fen file is also possible
+% the file #1.fen should contain nothing but a fen of
+% a game
+\def\loadgame#1{%
+ \def\load@read{}%
+ \newread\load@in%
+ \openin\load@in=#1.fen\relax%
+ \read\load@in to \load@read%
+ \closein\load@in%
+ \expandafter\FenBoard\load@read)}
+
+%%% temporary storing of a game position, without resorting to files
+% \def\storegame#1{\Fen@calculate%
+% \def#1{\temp@board}}
+% \def\restoregame#1{\expandafter\FenBoard#1)}
+\def\@storegame#1{\Fen@calculate%
+ \expandafter\xdef\csname chessgame.#1\endcsname{\temp@board}}
+\def\@restoregame#1{%
+ \edef\restore@temp{\csname chessgame.#1\endcsname}%
+ \expandafter\FenBoard\restore@temp)}
+
+\let\mystore=\@storegame
+\let\myrestore=\@restoregame
+
+\def\storegame#1{%
+ \@storegame{#1}%
+ \@restoregame{skak.temp.previous}%
+ \@storegame{#1.previous}%
+ \@restoregame{#1}}
+
+\def\restoregame#1{%
+ \@restoregame{#1.previous}%
+ \@storegame{skak.temp.previous}%
+ \@storegame{skak.mainline.previous}%
+ \@restoregame{#1}%
+ \@storegame{skak.mainline}}
+
+% end skak.sty