(;GM[1]FF[4]SZ[19]
GN[Black can force a ko after W1 and W3]
PC[http://senseis.xmp.net/?BQM564]AP[GoWiki:2009]
DT[2012-03-31]
C[Diagram from http://senseis.xmp.net/?BQM564

Black can force a ko after W1 and W3]
PL[W]

AB[po][qo][pp][pq]
AW[on][pn][qn][oo][op][oq]
LB[rr:a]

;W[pr]C[W1]MN[1]
;B[qr]C[B2]MN[2]
;W[ro]C[W3]MN[3]
;B[qq]C[B4]MN[4]
;W[rp]C[W5]MN[5]
;B[or]C[B6]MN[6]
;W[nr]C[W7]MN[7]
;B[ps]C[B8]MN[8]

;LB[rr:a]
)
