(;GM[1]FF[4]SZ[7:3]
GN[Black uses her irremovable ko-threat.]
PC[http://senseis.xmp.net/?posting=3073]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?posting=3073

Black uses her irremovable ko-threat.]
PL[B]

AB[db][ec][fc]
AW[ea][fa][ga][eb][fb][gb]

;W[ab]C[W2]MN[2]
;B[da]C[B3]MN[3]

;
)
