(;GM[1]FF[4]SZ[19]
GN[Simple]
PC[http://senseis.xmp.net/?BeginnerExercise271/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise271/Solution

Simple]
PL[B]

AB[fa][fb][ac][ec][fc][ad][bd][cd][dd]
AW[ca][da][ab][eb][bc][cc][dc]
LB[bb:a]

;B[ba]C[B1]MN[1]

;LB[bb:a]
)
