(;GM[1]FF[4]SZ[19]
GN[Black to kill]
PC[http://senseis.xmp.net/?GokyoShumyoSection2Problem7/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection2Problem7/Attempts

Black to kill]
PL[B]

AB[cc][gc][bd][cd][dd][ed][fd]
AW[bb][cb][bc][dc][ec]
CR[dc][ec]

;B[eb]C[B1]MN[1]
;W[db]C[W2]MN[2]
;B[fb]C[B3]MN[3]

;CR[dc][ec]
)
