(;GM[1]FF[4]SZ[19]
GN[Enemy's vital point]
PC[http://senseis.xmp.net/?Cornershapes/Discussion]AP[GoWiki:2009]
DT[2011-07-11]
C[Diagram from http://senseis.xmp.net/?Cornershapes/Discussion

Enemy's vital point]
PL[B]

AB[gb][ec][fc][gc][dd][ce][de][bf][cg]
AW[db][dc][bd][cd][be]

;B[bb]C[B1]MN[1]
;W[ba]C[W2]MN[2]
;B[bc]C[B3]MN[3]

;
)
