(;GM[1]FF[4]SZ[19]
GN[B4 would be wrong.]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem307/Solution]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem307/Solution

B4 would be wrong.]
PL[W]

AB[jn][kn][io][ko][ip][kp][hq][jq][kr][ls]
AW[hm][jm][km][gn][in][ln][ho][lo][hp][lp][eq][fq][gq][kq][lq][er][mr][es]

;W[is]C[W1]MN[1]
;B[js]C[B2]MN[2]
;W[hr]C[W3]MN[3]
;B[ir]C[B4]MN[4]
;W[iq]C[W5]MN[5]

;
)
