(;GM[1]FF[4]SZ[19]
GN[Black makes ko]
PC[http://senseis.xmp.net/?GokyoShumyoSection3Problem41/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection3Problem41/Attempts

Black makes ko]
PL[B]

AB[fa][gb][hb][hc][bd][dd][ed][hd][be][ce][ge]
AW[bb][db][fb][bc][cc][dc][fc][gc][cd]

;B[ca]C[B1]MN[1]
;W[ea]C[W2]MN[2]
;B[da]C[B3]MN[3]
;W[ec]C[W4]MN[4]
;B[eb]C[B5]MN[5]

;
)
