(;GM[1]FF[4]SZ[19]
GN[The ko idea no longer works for White]
PC[http://senseis.xmp.net/?BQM578/Attempt]AP[GoWiki:2009]
DT[2013-04-23]
C[Diagram from http://senseis.xmp.net/?BQM578/Attempt

The ko idea no longer works for White]
PL[B]

AB[ga][gb][ec][fc][gc][ed][be][ce][de]
AW[da][ea][fa][ab][eb][fb][ac][bc][cc][dc]

;B[ba]C[B5]MN[5]
;W[cb]C[W6]MN[6]
;B[ca]C[B7]MN[7]
;W[bb]C[W8]MN[8]
;B[db]C[B9]MN[9]

;
)
