(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem91/Solution]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem91/Solution

Solution]
PL[B]

AB[lp][mp][np][op][pp][lq][qq][rq][sq][lr][ls]
AW[mq][nq][oq][mr][qr][rr][ms][ns][os]

;B[pr]C[B1]MN[1]
;W[pq]C[W2]MN[2]
;B[or]C[B3]MN[3]
;W[ps]C[W4]MN[4]
;B[rs]C[B5]MN[5]
;W[sr]C[W6]MN[6]
;B[qs]C[B7]MN[7]

;
)
