\documentstyle[a4wide,chess]{article}
\begin{document}
{\font\Chess=chess10
\board{rnbqkbnr}
      {pppppppp}
      { * * * *}
      {* * * * }
      { * * * *}
      {* * * * }
      {PPPPPPPP}
      {RNBQKBNR}
$$\showboard$$
\centerline{{\tt chess10}}\smallskip}
         
{\font\Chess=chess20
\board{rnbqkbnr}
      {pppppppp}
      { * * * *}
      {* * * * }
      { * * * *}
      {* * * * }
      {PPPPPPPP}
      {RNBQKBNR}
$$\showboard$$
\centerline{{\tt chess20}}\smallskip}
         
{\font\Chess=chess30
\board{rnbqkbnr}
      {pppppppp}
      { * * * *}
      {* * * * }
      { * * * *}
      {* * * * }
      {PPPPPPPP}
      {RNBQKBNR}
$$\showboard$$
\centerline{{\tt chess30}}\smallskip}

\end{document}