(;GM[1]FF[4]SZ[19]
GN[Black tries "b"]
PC[http://senseis.xmp.net/?BeginnerExercise229/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise229/Attempts

Black tries "b"]
PL[B]

AB[da][ea][fa][cb][cc][fc][bd][cd][gd][ge][gf]
AW[ha][db][eb][fb][dc][hc][dd][hd][be][ce][de][he][dg]

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

;
)
