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

Prevention]
PL[B]

AB[dd]
SQ[ec][ce]
LB[db:b][cc:c][bd:b][cd:a]

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

;SQ[ec][ce]
LB[db:b][cc:c][bd:b][cd:a]
)
