(;GM[1]FF[4]SZ[19]
GN[Black dies]
PC[http://senseis.xmp.net/?KyuExercise27/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KyuExercise27/Attempts

Black dies]
PL[B]

AB[ba][cb][cc][cd]
AW[ca][da][db][dc][dd][be][ce][de]

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

;
)
