(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[http://senseis.xmp.net/?BeginnerExercise324/Solution]AP[GoWiki:2009]
DT[2011-01-16]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise324/Solution

Solution]
PL[W]

AB[ca][eb][gb][ec][bd][cd][dd][bf]
AW[ab][db][bc][cc][ad]

;W[ba]C[W1]MN[1]
;B[da]C[B2]MN[2]
;W[cb]C[W3]MN[3]

;
)
