(;GM[1]FF[4]SZ[19]
GN[white to win the semeai in the corner - black cuts]
PC[http://senseis.xmp.net/?BQM271]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BQM271

white to win the semeai in the corner - black cuts]
PL[B]

AB[pm][on][pn][po][pp][qq][qr][rr]
AW[oo][qo][op][qp][rp][pq][rq][pr]

;B[oq]C[B1]MN[1]
;W[or]C[W2]MN[2]
;B[nq]C[B3]MN[3]
;W[sr]C[W4]MN[4]

;
)
