(;GM[1]FF[4]SZ[4]
GN[Black to play]
PC[http://senseis.xmp.net/?KyuExercise201/Solution]AP[GoWiki:2009]
DT[2011-10-12]
C[Diagram from http://senseis.xmp.net/?KyuExercise201/Solution

Black to play]
PL[B]

AB[ab][bb][ac]
AW[da][cb][db][bc][dc][ad][cd][dd]

;B[ca]C[B1]MN[1]
;W[ba]C[W2]MN[2]
;B[bd]C[B3]MN[3]

;
)
