(;GM[1]FF[4]SZ[19]
GN[]
PC[http://senseis.xmp.net/?BeginnerExercise106/Solution]AP[GoWiki:2009]
DT[2014-08-01]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise106/Solution

]
PL[B]

AB[da][bb][db][ac][bc][cc]
AW[ca][ea][eb][dc][ec][ad][bd][cd][dd]

;B[cb]C[B1]MN[1]
;W[ba]C[W2]MN[2]
;B[aa]C[B3]MN[3]

;
)
