(;GM[1]FF[4]SZ[19]
GN[Black hits the shape point]
PC[http://senseis.xmp.net/?ShapeProblem3]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?ShapeProblem3

Black hits the shape point]
PL[B]

AB[dc][ec][ed][ee][df]
AW[cb][cc][dd][de]
LB[cd:a][ef:b]

;B[be]C[B1]MN[1]
;W[bd]C[W2]MN[2]
;B[cf]C[B3]MN[3]
;W[ac]C[W4]MN[4]

;LB[cd:a][ef:b]
)
