(;GM[1]FF[4]SZ[4]
GN[A]
PC[http://senseis.xmp.net/?ShortestAToBProofGames4x4]AP[GoWiki:2009]
DT[2015-07-30]
C[Diagram from http://senseis.xmp.net/?ShortestAToBProofGames4x4

A]
PL[B]

AB[bb][bc]
AW[aa][ba][ca][db][ac][cc][ad][bd][dd]


;
)
