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%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 10-7-3 on page 711.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{183.83385pt}

\begin{filecontents*}{sample.sud}
..9....64
4........
1..36..72
..46....9
...9.3...
2....54..
92..57..8
........5
34....6..
A moderate challenge
\end{filecontents*}

\StartShownPreambleCommands
\usepackage{solvesudoku}
% use previously defined sample.sud file

\StopShownPreambleCommands
\begin{document}
% produce the solution:
\getproblem{sample.sud}
\reduceallcells \keepreducing
\writegame
% print it (using printsudoku):
\cluefont{\small\sffamily}
\cellsize{1.2\baselineskip}
\sudoku{sud.out}
\end{document}