lyx_mirror/lib/tex/lyxchess.sty

%
% chess.sty
% ---------
% Style file for writing about chess games
% Author : Piet Tutelaers (internet: rcpt@urc.tue.nl)
% Version: 1.2 (Febr. 1992)
%    Improvements over version 1.1
%     - added `\v{S}ahovski Informator' symbols
%     -`en passant capture' bug fixed (reported by Jonathan Mestel)
%     -change {--} into \hbox{--} to prevent hyphenation within move
%     -\move's lined up on last row (or digit in case of castling)
%     -handling of promotion improved
%       * Black promotion problem solved (plain TeX)
%       * comment allowed also with promotion
%       * if no promotion piece is provided a default Q(ueen) is supposed
%     Thanks to: Jan Jaap Spreij (puls@cs.rug.nl)
%     -improved interface to plain TeX
%     -language support using the babel package from Johannes Braams
%      (currently support for english, dutch, german and french but you
%       can add an extra language `foreign' by:
%	  1. creating `foreign.sty' for cooperating with `babel'
%	  2. search for FOREIGN and follow the instructions in the comments)
%     - \begin{nochess} ... \end{nochess}
%     -chessfig10 renamed to chessf10 (service to MSDOS users)
% Version: 1.1 (17 Nov 1990)
%    Improvements over version 1.0:
%     -TeX code cleaned up (thanks to TeX-wizzard Victor Eijkhout)
%     -moving a King does not generate a castling move when this 
%      King already moved
%     -renamed internal macro `\\' because LaTeX uses that
%     -better hooks for foreign languages (look for lines marked with
%      %%FOREIGN%%)
%    Torture test:
%      If you change something in the chess.sty style check if everything 
%      else is still working with torture-test.ltx (LaTeX) or 
%      torture-test.tex (plain TeX).
%    Known problems:
%     -The analysis mode can not be used within arguments of macros
%         not: \centerline{|21.N5*f3|}	but: |\centerline{21.N5*f3}|
% Version: 1.0 (5 Jan 1990)
%

%
% Macro specific initialisations
%
{\def\format{plain}
\ifx\fmtname\format
   \ifcat/@ \gdef\makeatletter{\catcode`@=11\relax}
      \gdef\resetat{\catcode`@=12\relax}
   \else\let\makeatletter\relax\let\resetat\relax\fi
   \gdef\mbox#1{\leavevmode\hbox{#1}}
   \gdef\Box{\vbox{\hrule height .1pt\hbox{\vrule width .1pt\kern3pt
             \vbox{\kern6pt}\kern3pt\vrule width .1pt}\hrule height .1pt}}
   \global\font\sc=cmcsc10
\else
   \gdef\line#1{\hbox to \textwidth{#1}}
\fi}

\makeatletter

%
% Do we have language support? Otherwise take default language!
%
% \ifx\undefined\babel@core@loaded\input english.sty\fi


\def\@set[#1#2](#3){%arguments: [a-h1-8](<letter>)
    \expandafter\xdef\csname#1#2\endcsname{#3}}

\def\@get#1[#2#3]{%arguments:\cs[a-h1-8]
    \edef#1{\csname#2#3\endcsname}}

\font\Chess=chess20

\newcount\@c % column
\newcount\@r % row
\newcount\@sum % row+column

\def\@col{\ifcase\@c\or a\or b\or c\or d\or e\or f\or g\or h\fi}

\def\@showchar{
   \@get\piece[\@col\the\@r]
   \if\piece E \ifodd\@sum 0\else Z\fi\else
   \if\piece P \ifodd\@sum P\else O\fi\else
   \if\piece p \ifodd\@sum p\else o\fi\else
   \if\piece R \ifodd\@sum R\else S\fi\else
   \if\piece B \ifodd\@sum B\else A\fi\else
   \if\piece N \ifodd\@sum N\else M\fi\else
   \if\piece r \ifodd\@sum r\else s\fi\else
   \if\piece b \ifodd\@sum b\else a\fi\else
   \if\piece n \ifodd\@sum n\else m\fi\else
   \if\piece K \ifodd\@sum K\else J\fi\else
   \if\piece Q \ifodd\@sum Q\else L\fi\else
   \if\piece k \ifodd\@sum k\else j\fi\else
   \if\piece q \ifodd\@sum q\else l\fi\else
   \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}

\def\@showrow#1{
   \@r=#1\@c=1
   \@sum=\@r\advance\@sum by\@c
   \loop
      \@showchar
      \ifnum\@c<8 \advance\@c by1\advance\@sum by1
   \repeat
}

\def\showboard{
\vbox{\offinterlineskip
   \hrule height1pt
   \hbox{\vrule width1pt\Chess
         \vbox{\hbox{\@showrow8}
               \hbox{\@showrow7}
               \hbox{\@showrow6}
               \hbox{\@showrow5}
               \hbox{\@showrow4}
               \hbox{\@showrow3}
               \hbox{\@showrow2}
               \hbox{\@showrow1}}%
         \vrule width1pt}
   \hrule height1pt}
}

% inner loop needs extra { ... }

\def\@emptyboard{
   \@r=1
   \loop
      {\@c=1
       \loop
         \@set[\@col\the\@r](E)
         \ifnum\@c<8 \advance\@c by1
       \repeat}
       \ifnum\@r<8 \advance\@r by 1
   \repeat
}

\def\@initboard{
% empty squares
   \@r=3
   \loop
     {\@c=1
      \loop
         \@set[\@col\the\@r](E)
         \ifnum\@c<8 \advance\@c by1
      \repeat}
      \ifnum\@r<6 \advance\@r by 1
   \repeat
% pawns
   \@c=1
   \loop
      \@set[\@col2](P)\@set[\@col7](p)
      \ifnum\@c<8 \advance\@c by1
   \repeat
% pieces
   \@set[a1](R)\@set[h1](R)
   \@set[a8](r)\@set[h8](r)
   \@set[b1](N)\@set[g1](N)
   \@set[b8](n)\@set[g8](n)
   \@set[c1](B)\@set[f1](B)
   \@set[c8](b)\@set[f8](b)
   \@set[d1](Q)\@set[e1](K)
   \@set[d8](q)\@set[e8](k)
}

%
% The next part defines a user friendly notation for chess moves. 
% Some examples:  |21. Nf3-e5, Ke8*f8 22. 0-0-0+, Bh8*a1|
%              :  |21.: Ke8*f8 22. Bh8*a1, 0-0|
%              :  |21 Nfe5 K*f8 22 0-0-0! B*a1|
%              :  |21: K*f8 22 B*a1 0-0|
%

\font\Fig=chessf10

\gdef\@king{{\Fig K}}
\gdef\@queen{{\Fig Q}}
\gdef\@rook{{\Fig R}}
\gdef\@bishop{{\Fig B}}
\gdef\@knight{{\Fig N}}
\gdef\@dash{\hbox{--}}
\gdef\@capt{$\times$}
\gdef\@dots{~$\ldots$,}
\gdef\@dot{\char46 }

%
% Make character codes for pieces depending on current language.
% (I cann't derive the Black values from the White using `\lowercase'!)
%

\def\define@White@pieces#1#2#3#4#5#6{% define character codes for White pieces
   \chardef\king@=`#1  \def\uc@king{#1}
   \chardef\queen@=`#2 \def\uc@queen{#2}
   \chardef\rook@=`#3  \def\uc@rook{#3}
   \chardef\bishop@=`#4\def\uc@bishop{#4}
   \chardef\knight@=`#5\def\uc@knight{#5}
   \chardef\pawn@=`#6  \def\uc@pawn{#6}}
\def\define@Black@pieces#1#2#3#4#5#6{% and now the Black pieces
   \def\lc@king{#1}\def\lc@queen{#2}\def\lc@rook{#3}
   \def\lc@bishop{#4}\def\lc@knight{#5}\def\lc@pawn{#6}}
\def\activate@pieces{% make them active
   \catcode\king@=\active\catcode\queen@=\active\catcode\rook@=\active%
   \catcode\bishop@=\active\catcode\knight@=\active}
\def\deactivate@pieces{% make them inactive
   \catcode\king@=11\catcode\queen@=11\catcode\rook@=11%
   \catcode\bishop@=11\catcode\knight@=11}
\def\ifcurrentlanguage#1#2{%if language defined then compare with \language
   \expandafter\ifx\csname l@#1\endcsname\relax%
   \else\ifnum\language=\expandafter\csname l@#1\endcsname\relax#2\fi\fi}
\def\select@pieces{% select pieces depending on language
   \ifcurrentlanguage{english}{%
      \define@White@pieces{K}{Q}{R}{B}{N}{P}
      \define@Black@pieces{k}{q}{r}{b}{n}{p}}
   \ifcurrentlanguage{dutch}{%
      \define@White@pieces{K}{D}{T}{L}{P}{I}
      \define@Black@pieces{k}{d}{t}{l}{p}{i}}
   \ifcurrentlanguage{german}{%
      \define@White@pieces{K}{D}{T}{L}{S}{B}
      \define@Black@pieces{k}{d}{t}{l}{s}{b}}
   \ifcurrentlanguage{french}{%
      \define@White@pieces{R}{D}{T}{F}{C}{P}
      \define@Black@pieces{r}{d}{t}{f}{c}{p}}
% Define here your language and choose an unique set of uppercase letters
% for the White pieces (KING, QUEEN, etc.) and the corresponding lowercase
% letters for the Black pieces (king, queen, etc.). 
%  \ifcurrentlanguage{FOREIGN}{%
%     \define@White@pieces{KING}{QUEEN}{ROOK}{BISHOP}{KNIGHT}{PAWN}
%     \define@Black@pieces{king}{queen}{rook}{bishop}{knight}{pawn}}
   }
\def\let@pieces#1#2#3#4#5{% let character codes be macros
   \let#1=\@king\let#2=\@queen\let#3=\@rook%
   \let#4=\@bishop\let#5=\@knight}

\catcode`|=\active\select@pieces
{\catcode`:=\active\catcode`.=\active\catcode`*=\active\catcode`-=\active
 \activate@pieces
 \gdef\trigger@pieces{
     \catcode`:=\active\catcode`.=\active\catcode`*=\active\catcode`-=\active
     \activate@pieces
     % I would like to say ``\let\king@=\@king'' but how?
     \ifcurrentlanguage{english}{\let@pieces{K}{Q}{R}{B}{N}}%
     \ifcurrentlanguage{dutch}{\let@pieces{K}{D}{T}{L}{P}}%
     \ifcurrentlanguage{german}{\let@pieces{K}{D}{T}{L}{S}}%
     \ifcurrentlanguage{french}{\let@pieces{R}{D}{T}{F}{C}}%
% Fill in your language and the uppercase letters for KING, QUEEN, etc.
% \ifcurrentlanguage{FOREIGN}{\let@pieces{KING}{QUEEN}{ROOK}{BISHOP}{KNIGHT}}%
% Your language will be activated by FOREIGN.sty.
     \let-=\@dash\let*=\@capt\let:=\@dots\let.=\@dot}%
 \gdef\@notation{\begingroup\let|=\endgroup\trigger@pieces}%
%
% Provide a `nochess' environment in which the `|' character becomes
% inactive for situations where the `|' is already in use (like in 
% the LaTeX `tabular' environment for example).
%
 \gdef\nochess{\begingroup\let|=\relax\catcode`\|=12\relax
         \catcode`:=12 \catcode`.=12 \catcode`*=12 \catcode`-=12
         \deactivate@pieces\let\endnochess=\endgroup}
 \gdef\chess{\begingroup\let\endchess=\endgroup\trigger@pieces}
}
\let|=\@notation

%
% Next part provides a ply (half move) generator
%

\newif\ifWhite     \newif\ifFigure    \newif\ifcapture

%
% next newif's needed for castling
%
\newif\ifKnotmoved \newif\ifknotmoved
\newif\ifcastling  \newif\ifoo

%
% Globals for special pawn moves (en passant capture and promotion)
%

\newif\ifenpassant \newif\ifpromotion

\def\@color#1{ %  Color of a piece     0: none, -1: black, 1: white
   \if #1E0\else
   \ifnum`#1=\uccode`#11\else-1\fi\fi}

%
% No checking is done for validity of moves, only legal moves behave well!!
%

\def\@ply#1#2#3#4#5 {% Syntax: [a-h][1-8][a-h][1-8]{Q|R|B|N}{Comment}
   \@get\piece[#1#2]\@get\capture[#3#4]\Figuretrue
   \if\capture E\capturefalse\else\capturetrue\fi
   \ifWhite
      \if\piece P\Figurefalse
         \if#46
             \if\eprow#3\capturetrue\enpassanttrue\fi
             \xdef\eprow{x}%
         \else
            \xdef\eprow{x}%
            \if#22
               \if#44\xdef\eprow{#3}\fi
            \else
               \if#48\promotiontrue\fi
            \fi
         \fi
      \else\xdef\eprow{x}
         \if\piece K% check for possible castling
            \ifKnotmoved
               \if#3g\if#41\castlingtrue\ootrue\fi
               \else\if#3c\if#41\castlingtrue\oofalse\fi\fi
               \fi
               \global\Knotmovedfalse
            \fi
         \fi
      \fi
      \ifcastling
          \@set[#1#2](E)\@set[#3#4](K)%
          \ifoo 0\@dash0\rlap{#5}\@set[f1](R)\@set[h1](E)%
          \else 0\@dash0\@dash0\rlap{#5}\@set[d1](R)\@set[a1](E)\fi
          \castlingfalse
      \else
          \ifFigure{\Fig\piece}\fi
          #1#2\ifcapture\@capt\else\@dash\fi#3#4%
          \rlap{\ifpromotion\expandafter\promovendus#5XYZ\else#5\fi}%
          \@set[#1#2](E)%
          \ifpromotion\@set[#3#4](\PROM)\else\@set[#3#4](\piece)\fi
          \ifenpassant\@set[#3#2](E)\enpassantfalse\fi
      \fi
      \global\Whitefalse
   \else % ``same'' for Black
      \if\piece p\Figurefalse
         \if#43
             \if\eprow#3\capturetrue\enpassanttrue\fi
             \xdef\eprow{x}%
         \else
            \xdef\eprow{x}%
            \if#27
               \if#45\xdef\eprow{#3}\fi
            \else
               \if#41\promotiontrue\fi
            \fi
         \fi
      \else\xdef\eprow{x}
         \if\piece k
            \ifknotmoved
               \if#3g\if#48\castlingtrue\ootrue\fi
               \else\if#3c\if#48\castlingtrue\oofalse\fi\fi
               \fi
               \global\knotmovedfalse
            \fi
         \fi
      \fi
      \ifcastling
          \@set[#1#2](E)\@set[#3#4](k)%
          \ifoo 0\@dash0\rlap{#5}\@set[f8](r)\@set[h8](E)%
          \else 0\@dash0\@dash0\rlap{#5}\@set[d8](r)\@set[a8](E)\fi%
          \castlingfalse
      \else
          \ifFigure{\Fig\if\piece rR\else\if\piece bB\else\if\piece nN\else
                        \if\piece qQ\else K\fi\fi\fi\fi}\fi
          #1#2\ifcapture\@capt\else\@dash\fi#3#4%
          \rlap{\ifpromotion\expandafter\promovendus#5XYZ\else#5\fi}%
          \@set[#1#2](E)%
          \ifpromotion\@set[#3#4](\prom)\else\@set[#3#4](\piece)\fi
          \ifenpassant\@set[#3#2](E)\enpassantfalse\fi
      \fi
      \global\Whitetrue
   \fi}

%
% Promovendus: treat first char of argument as promotion piece if queen, 
% rook, knight or bishop; otherwise consider it as comment and take queen
% as default promotion. Leave in \PROM White promoting piece (Q|R|B|N) 
% and in \prom Black's version (q|r|b|n).
%

\def\promovendus#1#2Z{%
   \if#1X\def\C{}\gdef\PROM{Q}\gdef\prom{q}%
   \else
     \ifnum`#1=\queen@ \gdef\PROM{Q}\gdef\prom{q}\def\C{\@comment#2}\else
     \ifnum`#1=\rook@  \gdef\PROM{R}\gdef\prom{r}\def\C{\@comment#2}\else
     \ifnum`#1=\bishop@\gdef\PROM{B}\gdef\prom{b}\def\C{\@comment#2}\else
     \ifnum`#1=\knight@\gdef\PROM{N}\gdef\prom{n}\def\C{\@comment#2}\else
       \gdef\PROM{Q}\gdef\prom{q}\def\C{\comment#1#2}%
   \fi\fi\fi\fi\fi%
   {\Fig\PROM}{\C}}
\def\@comment#1XY{#1}

\newcount\movecount \movecount=0

\def\showmove#1#2{\par
   \line{\strut\hbox to1cm{\hfil\the\movecount.}%
   \hbox to2.8cm{\hfil#1}\hbox to2.8cm{\hfil#2}\hfil}\par}

\def\move#1 #2 {
   \advance\movecount by 1
   \showmove{\@ply#1 }{\@ply#2 }}

\def\ply#1 {
   \ifWhite
     \advance\movecount by 1
     \showmove{\@ply#1 }{}
   \else
     \showmove{$\ldots$}{\@ply#1 }
   \fi}

\def\newgame{\vskip0pt\movecount=0 \@initboard
    \Whitetrue\castlingfalse\xdef\eprow{x}
    \Knotmovedtrue\knotmovedtrue
    \promotionfalse\enpassantfalse}

\def\@dolist{\afterassignment\@dodolist\let\@@next= } % Answer 11.5 TeXbook
\def\@dodolist{\ifx\@@next\@endlist \let\@@next\relax % adapted to generate
  \else \@nextitem\let\@@next\@dolist \fi             % chess diagrams
  \@@next}

\def\@endlist{\@endlist}

\def\@nextitem{%
       \if\@@next\space      \@set[\@col\the\@r](E)\else
       \if\@@next *          \@set[\@col\the\@r](E)\else
       \if\@@next\uc@pawn    \@set[\@col\the\@r](P)\else
       \if\@@next\lc@pawn    \@set[\@col\the\@r](p)\else
       \if\@@next\uc@rook    \@set[\@col\the\@r](R)\else
       \if\@@next\lc@rook    \@set[\@col\the\@r](r)\else
       \if\@@next\uc@bishop  \@set[\@col\the\@r](B)\else
       \if\@@next\lc@bishop  \@set[\@col\the\@r](b)\else
       \if\@@next\uc@knight  \@set[\@col\the\@r](N)\else
       \if\@@next\lc@knight  \@set[\@col\the\@r](n)\else
       \if\@@next\uc@queen   \@set[\@col\the\@r](Q)\else
       \if\@@next\lc@queen   \@set[\@col\the\@r](q)\else
       \if\@@next\uc@king    \@set[\@col\the\@r](K)\else
       \if\@@next\lc@king    \@set[\@col\the\@r](k)\else
       \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
       \advance\@c by1}

\def\@initrow#1#2{\@r=#1\@c=1\@dolist#2\@endlist}

%
% For setting up a position
%
\def\board#1#2#3#4#5#6#7#8{
	\@initrow8{#1}
	\@initrow7{#2}
	\@initrow6{#3}
	\@initrow5{#4}
	\@initrow4{#5}
	\@initrow3{#6}
	\@initrow2{#7}
	\@initrow1{#8}}

%
% Next macros for defining chess position (thanks to Victor Eijkhout)
%
\def\White(#1){\def\match{xxx}\xWhite#1,xxx,}
\def\xWhite#1,{\def\temp{#1}
  \ifx\temp\match \else \WhitePieceOrPawn#1XY \expandafter\xWhite \fi}
\def\WhitePieceOrPawn#1#2#3#4Y{%
  \if#3X \@set[#1#2](P)
  \else\ifnum`#1=\king@	 \@set[#2#3](K)\else % King
       \ifnum`#1=\queen@ \@set[#2#3](Q)\else % Queen
       \ifnum`#1=\rook@	 \@set[#2#3](R)\else % Rook
       \ifnum`#1=\bishop@\@set[#2#3](B)\else % Bishop
       \ifnum`#1=\knight@\@set[#2#3](N)\else % kNight
       \fi\fi\fi\fi\fi
  \fi}

\def\Black(#1){\def\match{xxx}\xBlack#1,xxx,}
\def\xBlack#1,{\def\temp{#1}
  \ifx\temp\match \else \BlackPieceOrPawn#1XY \expandafter\xBlack \fi}
\def\BlackPieceOrPawn#1#2#3#4Y{
  \if#3X\@set[#1#2](p)
  \else\ifnum`#1=\king@  \@set[#2#3](k)\else % King
       \ifnum`#1=\queen@ \@set[#2#3](q)\else % Queen
       \ifnum`#1=\rook@  \@set[#2#3](r)\else % Rook
       \ifnum`#1=\bishop@\@set[#2#3](b)\else % Bishop
       \ifnum`#1=\knight@\@set[#2#3](n)\else % kNight
       \fi\fi\fi\fi\fi
  \fi}

\def\position{\begingroup%
    \@emptyboard\movecount=0\xdef\eprow{x}
    \global\Whitetrue\global\castlingfalse
    \global\Knotmovedtrue\global\knotmovedtrue
    \global\promotionfalse\global\enpassantfalse}
\def\endposition{\endgroup}

% And now we define most symbols that are used in `\v{S}ahovski Informator'
% (Chess Informant). For a complete list see Informant#51 (1991) pp 10-12.
% If you add symbols realize that the macros should be usable by plain TeX
% and LaTeX and that the (La)TeX names should be suggestive and clear!
% But don't use uppercase letters or existing names (center)!
% Thanks go to John Saba (saba@ccit.arizona.edu) and Henry Thomas 
% (hthomas@irisa.fr) for their help in defining next symbols.
\font\symbolten=cmsy10 \font\smrm=cmr6 \font\symbolsix=cmsy6
\def\wbetter{\mbox{\baselineskip0pt$\vcenter{\vbox{\hbox{+}\hbox{=}}}$}}
\def\bbetter{\mbox{\baselineskip0pt
   $\vcenter{\vbox{\hbox{=}\kern-.3ex\hbox{+}}}$}}
\def\wupperhand{\mbox{$\pm$}}
\def\bupperhand{\mbox{$\mp$}}
\def\wdecisive{\mbox{$+\hbox{}-$}}
\def\bdecisive{\mbox{$-\hbox{}+$}}
\def\equal{=}
\def\unclear{\mbox{$\infty$}}
\def\compensation{\mbox{\baselineskip0pt$\vcenter{\vbox{%
   \hbox{\kern.056em\vbox{\hrule width0.89em\kern0.35ex\hrule width0.89em}}
   \kern.2ex\hbox{$\infty$}}}$}}
% next symbol should be build using METAFONT
\def\devadvantage{{\symbolten\char'015}\kern-4.8pt
   \vrule width 2.4pt height6pt depth-5.6pt
   \vrule width .4pt height8pt depth-5.6pt\kern2.4pt}
\def\moreroom{{\symbolten\char'015}}
\def\withattack{$\rightarrow$}
\def\withinit{$\uparrow$}
\def\counterplay{\hbox{\baselineskip0pt%
   $\vcenter{\vbox{\hbox{$\leftarrow$}\hbox{$\rightarrow$}}}$}}
\def\zugzwang{$\odot$}
\def\mate{\kern.4pt\mbox{%
   \vrule width2ex height1.18ex depth-1.1ex\kern-2ex
   \vrule width2ex height.52ex depth-.44ex\kern-1.381ex
   \vrule width.08ex height1.8ex depth.2ex\kern0.615ex
   \vrule width.08ex height1.8ex depth.2ex\kern0.406ex}\kern.4pt}
\def\withidea{$\triangle$}
\def\onlymove{$\Box$}
\def\betteris{\mbox{\baselineskip0pt
   $\vcenter{\vbox{\hbox{$\frown$}\kern-0.35ex\hrule width0.95em}}$}}
\def\file{$\Leftrightarrow$}
% next symbol should be build using METAFONT
\def\diagonal{$\nearrow$}
\def\centre{$\Box$\kern-.6em\raise.54ex\hbox{\smrm\char'053}}
\def\kside{$\gg$}
\def\qside{$\ll$}
\def\weakpt{$\times$}
\def\ending{$\perp$}
% John Saba's method:
\def\blackbox{\vrule height .8ex width 1.2ex depth 0ex}
\def\whitebox{\vbox{\hrule height .1pt\hbox{\vrule width .1pt\kern.6ex
              \vbox{\kern.8ex}\kern.6ex\vrule width .1pt}\hrule height .1pt}}
\def\bishoppair{\whitebox\kern-2pt\raise1.8pt\hbox{\whitebox}}
\def\opposbishops{\whitebox\kern-2pt\raise1.8pt\hbox{\blackbox}}
\def\samebishops{\blackbox\kern-2pt\raise1.8pt\hbox{\blackbox}}
% My method
%\def\bishoppair{\setbox0=\hbox{%
%   \vrule width1.4ex height1ex depth-.92ex\kern-1.4ex
%   \vrule width1.4ex height.08ex depth0pt\kern-1.4ex
%   \vrule width.08ex height1ex depth0ex\kern1.24ex
%   \vrule width.08ex height1ex depth0ex}%
%   \kern.4pt\mbox{\copy0\kern-.6ex\raise0.56ex\box0}\kern.4pt}
%\def\opposbishops{\kern.4pt\mbox{%
%   \vrule width1.4ex height1ex depth-.92ex\kern-1.4ex
%   \vrule width1.4ex height.08ex depth0pt\kern-1.4ex
%   \vrule width.08ex height1ex depth0ex\kern1.24ex
%   \vrule width.08ex height1ex depth0ex\kern-.6ex
%   \vrule width1.4ex height1.56ex depth-0.56ex}\kern.4pt }
%\def\samebishops{\kern.4pt\mbox{%
%   \vrule width1.4ex height1ex depth0ex\kern-.6ex
%   \vrule width1.4ex height1.56ex depth-0.56ex}\kern.4pt}
\def\unitedpawns{$\circ\kern-.05em\circ$}
\def\seppawns{$\circ\kern-.3em\cdot\kern-.35em\cdot\kern-.1em\circ$}
\def\doublepawns{\mbox{\baselineskip0pt
   $\vcenter{\vbox{\hbox{$\circ$}\vskip.8pt\hbox{$\circ$}}}$}}
% Next symbol still not perfect ...
\def\passedpawn{\mbox{\baselineskip0pt
   $\vcenter{\vbox{\hbox{\kern0.14em\symbolsix\char'042}\hbox{$\circ$}}}$}}
\def\morepawns{$>$}
\def\timelimit{$\oplus$}
\def\novelty{{\sc N}}
\def\comment{{\sc RR}}
\def\various{{\sc R}}
\def\without{\kern.4pt\mbox{%
   \vrule width 1ex height.08ex depth0ex\kern-0.08ex
   \vrule width0.08ex height1.5ex depth0ex}\kern.4pt}
\def\with{\kern.4pt\mbox{%
   \vrule width 0.08ex height1.5ex depth0ex\kern-0.08ex
   \vrule width 1ex height.08ex depth0ex}\kern.4pt}
\def\etc{$\parallel$}
\def\see{\kern.4pt\mbox{\vrule width 1em height.54ex depth-.46ex}\kern.4pt}