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

Two stage ko]
PL[B]

AB[cb][hb][bc][cc][gc][bd][dd][ed][fd][gd][be][bf]
AW[ca][fa][bb][db][eb][gb][dc][ec][fc][cd][ce][cf][bg][cg]

;B[ha]C[B1]MN[1]
;W[da]C[W2]MN[2]
;B[ga]C[B3]MN[3]
;W[ba]C[W4]MN[4]
;B[ab]C[B5]MN[5]
;W[af]C[W6]MN[6]
;B[fb]C[B7]MN[7]

;
)
