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

S.neighbors4()]
PL[B]

CR[cc][bd][dd][ce]


;CR[cc][bd][dd][ce]
)
