(;GM[1]FF[4]SZ[19]
GN[solution]
PC[http://senseis.xmp.net/?GokyoShumyoSection4Problem31/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection4Problem31/Solution

solution]
PL[W]

AB[bb][eb][cc][dc][gc][ed][fd][gd][ce][cf][ef]
AW[fb][gb][bc][ec][fc][hc][ic][bd][cd][dd]

;W[da]C[W1]MN[1]
;B[cb]C[B2]MN[2]
;W[ab]C[W3]MN[3]

;
)
