(;GM[1]FF[4]SZ[19]
GN[solution]
PC[http://senseis.xmp.net/?GokyoShumyoSection4Problem12/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection4Problem12/Solution

solution]
PL[W]

AB[cb][fb][bc][gc][bd][cd][dd][fd][ee][df][ef]
AW[db][dc][ec][ad][ed][be][ce][de][cg]

;W[bb]C[W1]MN[1]
;B[ab]C[B2]MN[2]
;W[ba]C[W3]MN[3]
;B[ca]C[B4]MN[4]
;W[cc]C[W5]MN[5]
;B[aa]C[B6]MN[6]
;W[ae]C[W9]MN[9]

;
)
