(;GM[1]FF[4]SZ[19]
GN[N.neighbors4()]
PC[http://senseis.xmp.net/?BinMatrix]AP[GoWiki:2009]
DT[2011-05-25]
C[Diagram from http://senseis.xmp.net/?BinMatrix

N.neighbors4()]
PL[B]

CR[ba][da][bb][db][bc][dc][ec][fc][cd][gd][de][ee][fe]


;CR[ba][da][bb][db][bc][dc][ec][fc][cd][gd][de][ee][fe]
)
