(;GM[1]FF[4]SZ[19]
GN[Failure]
PC[http://senseis.xmp.net/?BeginnerExercise257/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise257/Solution

Failure]
PL[B]

AB[da][cb][db][cc][bd][cd]
AW[ea][ab][eb][dc][fc][dd][be][ce][bg]

;B[ad]C[B1]MN[1]
;W[bb]C[W2]MN[2]
;B[ba]C[B3]MN[3]
;W[aa]C[W4]MN[4]

;
)
