(;GM[1]FF[4]SZ[19]
GN[failure white]
PC[http://senseis.xmp.net/?KyuExercise12/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KyuExercise12/Solution

failure white]
PL[B]

AB[cb][db][dc][ed][ae][be][ce][de][ee][ff]
AW[bb][cc][ec][fc][gc][ad][bd][cd][dd][fe][ge][gf][bg][dg][fg]

;B[ac]C[B1]MN[1]
;W[bc]C[W2]MN[2]
;B[ab]C[B3]MN[3]
;W[ba]C[W4]MN[4]
;B[ca]C[B5]MN[5]

;
)
