(;GM[1]FF[4]SZ[19]
GN[Attempt 4 - Easy approach]
PC[http://senseis.xmp.net/?LGroup/Discussion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?LGroup/Discussion

Attempt 4 - Easy approach]
PL[B]

AB[cb][cc][bd][cd]
AW[db][eb][dc][dd][be][ce][ee][bf]

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

;
)
