(;GM[1]FF[4]SZ[19]
GN[White wins b)]
PC[http://senseis.xmp.net/?GokyoShumyoSection4Problem4/Solution]AP[GoWiki:2009]
DT[2010-10-30]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection4Problem4/Solution

White wins b)]
PL[W]

AB[cb][db][eb][fb][cc][cd][be][bf][cg]
AW[bb][gb][bc][dc][fc][gc][bd][dd][ce][df]
LB[aa:b][ca:a]

;W[ba]C[W1]MN[1]
;B[ad]C[B2]MN[2]
;W[ec]C[W3]MN[3]
;B[ac]C[B4]MN[4]
;W[fa]C[W5]MN[5]
;B[ab]C[B6]MN[6]
;W[ea]C[W7]MN[7]

;LB[aa:b][ca:a]
)
