(;GM[1]FF[4]SZ[19]
GN[(if black captures, white kills with a placement; if 7 at 8 black is out of liberties)]
PC[http://senseis.xmp.net/?RTGProblem49/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RTGProblem49/Attempts

(if black captures, white kills with a placement; if 7 at 8 black is out of liberties)]
PL[B]

AB[bb][fb][bc][cc][dc][ec][fc][gc][hc][ic]
AW[da][fa][ha][cb][db][eb][gb][hb][ib][jc][bd][cd][dd][ed][fd][gd][hd][id][jd]

;B[ba]C[B5]MN[5]
;W[ac]C[W6]MN[6]
;B[ca]C[B7]MN[7]
;W[ab]C[W8]MN[8]

;
)
