(;GM[1]FF[4]SZ[3]
GN[1-4]
PC[http://senseis.xmp.net/?ShortestAToBProofGames3x3/Solution]AP[GoWiki:2009]
DT[2015-03-24]
C[Diagram from http://senseis.xmp.net/?ShortestAToBProofGames3x3/Solution

1-4]
PL[B]

AB[aa][bb][bc]
AW[ca][cb][cc]

;W[ab]C[W2]MN[2]
;W[ba]C[W4]MN[4]

;
)
