\documentclass{article}
\usepackage{pstricks}
\usepackage{multido}

\newcommand{\goboardNine}[1]{
	\psset{unit=#1}
	\begin{pspicture}(-0.5,-0.5)(8.5,8.5)
	\psline[linewidth=3pt,linecolor=black,linestyle=solid](-0.5,-0.5)(8.5,-0.5)(8.5,8.5)(-0.5,8.5)(-0.5,-0.5)
	\multido{\nx=0+1}{9}{\psline[linewidth=1pt,linecolor=black,linestyle=solid](\nx,0)(\nx, 8)}
	\multido{\ny=0+1}{9}{\psline[linewidth=1pt,linecolor=black,linestyle=solid](0,\ny)(8,\ny)}
	\end{pspicture}
}

\newcommand{\goboardEleven}[1]{
	\psset{unit=#1}
	\begin{pspicture}(-0.5,-0.5)(10.5,10.5)
	\psline[linewidth=3pt,linecolor=black,linestyle=solid](-0.5,-0.5)(10.5,-0.5)(10.5,10.5)(-0.5,10.5)(-0.5,-0.5)
	\multido{\nx=0+1}{11}{\psline[linewidth=1pt,linecolor=black,linestyle=solid](\nx,0)(\nx, 10)}
	\multido{\ny=0+1}{11}{\psline[linewidth=1pt,linecolor=black,linestyle=solid](0,\ny)(10,\ny)}
	\end{pspicture}
}

\newcommand{\goboardThirteen}[1]{
	\psset{unit=#1}
	\begin{pspicture}(-0.5,-0.5)(12.5,12.5)
	\psline[linewidth=3pt,linecolor=black,linestyle=solid](-0.5,-0.5)(12.5,-0.5)(12.5,12.5)(-0.5,12.5)(-0.5,-0.5)
	\multido{\nx=0+1}{13}{\psline[linewidth=1pt,linecolor=black,linestyle=solid](\nx,0)(\nx, 12)}
	\multido{\ny=0+1}{13}{\psline[linewidth=1pt,linecolor=black,linestyle=solid](0,\ny)(12,\ny)}
	\end{pspicture}
}

\newcommand{\goboardFiveteen}[1]{
	\psset{unit=#1}
	\begin{pspicture}(-0.5,-0.5)(14.5,14.5)
	\psline[linewidth=3pt,linecolor=black,linestyle=solid](-0.5,-0.5)(14.5,-0.5)(14.5,14.5)(-0.5,14.5)(-0.5,-0.5)
	\multido{\nx=0+1}{15}{\psline[linewidth=1pt,linecolor=black,linestyle=solid](\nx,0)(\nx, 14)}
	\multido{\ny=0+1}{15}{\psline[linewidth=1pt,linecolor=black,linestyle=solid](0,\ny)(14,\ny)}
	\end{pspicture}
}

\newcommand{\goboard}[1]{
	\psset{unit=#1}
	\begin{pspicture}(-0.5,-0.5)(18.5,18.5)
	\psline[linewidth=3pt,linecolor=black,linestyle=solid](-0.5,-0.5)(18.5,-0.5)(18.5,18.5)(-0.5,18.5)(-0.5,-0.5)
	\multido{\nx=0+1}{19}{\psline[linewidth=1pt,linecolor=black,linestyle=solid](\nx,0)(\nx, 18)}
	\multido{\ny=0+1}{19}{\psline[linewidth=1pt,linecolor=black,linestyle=solid](0,\ny)(18,\ny)}
	\end{pspicture}
}

\begin{document}

%\goboardNine{0.5cm}
%\goboardEleven{0.5cm}
%\goboardThirteen{0.5cm}
%\goboardFiveteen{0.5cm}
\goboard{0.5cm}

\end{document}
