(;GM[1]FF[4]SZ[19]
GN[Attacking play: the [clamp\]]
PC[http://senseis.xmp.net/?DefectInAWall]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?DefectInAWall

Attacking play: the [clamp\]]
PL[W]

AB[db][dd][de][df]
AW[cc][cd][ce][cf][cg]
CR[eb][fb][ed][fd]

;W[dc]C[W1]MN[1]
;B[ec]C[B2]MN[2]
;W[fc]C[W3]MN[3]

;CR[eb][fb][ed][fd]
)
