(;GM[1]FF[4]SZ[19]
GN[Black to make ko]
PC[http://senseis.xmp.net/?GokyoShumyoSection3Problem31]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection3Problem31

Black to make ko]
PL[B]

AB[bb][jb][ac][ec][kc][bd][ed][fd][hd][jd][ce][de][he][ke][bf]
AW[cb][db][eb][gb][bc][cc][fc][gc][ic][cd]


;
)
