(;GM[1]FF[4]SZ[19]
GN[solution]
PC[http://senseis.xmp.net/?BQM251]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BQM251

solution]
PL[B]

AB[op][pp][qp][rp][pq][rr]
AW[on][qn][no][ro][np][nq][pr][qr]

;B[or]C[B1]MN[1]
;W[oq]C[W2]MN[2]
;B[qq]C[B3]MN[3]
;W[nr]C[W4]MN[4]
;B[qs]C[B5]MN[5]
;W[os]C[W6]MN[6]
;B[sq]C[B7]MN[7]

;
)
