(;GM[1]FF[4]SZ[19]
GN[... and start the ko. (W2 pass)]
PC[http://senseis.xmp.net/?BentFourInTheCornerIsDead]AP[GoWiki:2009]
DT[2009-09-12]
C[Diagram from http://senseis.xmp.net/?BentFourInTheCornerIsDead

... and start the ko. (W2 pass)]
PL[B]

AB[ba][ea][ab][eb][cc][dc][ec][cd][ae][be][ce]
AW[da][bb][cb][db][bc][ad][bd]

;B[aa]C[B1]MN[1]
;B[ac]C[B3]MN[3]

;
)
