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

Endgame technique]
PL[W]

AB[bb][db][dc][bd][cd]
AW[eb][fb][ec][dd][be][ce][ee][bf]

;W[cc]C[W1]MN[1]
;B[bc]C[B2]MN[2]
;W[da]C[W3]MN[3]
;B[cb]C[B4]MN[4]

;
)
