(;GM[1]FF[4]SZ[19]
GN[Answer]
PC[http://senseis.xmp.net/?33PointInvasion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?33PointInvasion

Answer]
PL[W]

AB[dd]
LB[cb:a]

;W[cc]C[W1]MN[1]
;B[dc]C[B2]MN[2]
;W[db]C[W3]MN[3]
;B[cd]C[B4]MN[4]

;LB[cb:a]
)
