(;GM[1]FF[4]SZ[19]
GN[White to play and kill]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem307/Attempts]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem307/Attempts

White to play and kill]
PL[W]

AB[in][jn][ho][jo][hp][jp][gq][iq][er][fr][jr][es][fs][gs][ks]
AW[gm][im][jm][fn][hn][kn][go][ko][gp][kp][dq][eq][fq][jq][kq][dr][lr][ds]
LB[hq:b][gr:a]

;W[hr]C[W1]MN[1]
;B[hs]C[B2]MN[2]
;W[is]C[W3]MN[3]

;LB[hq:b][gr:a]
)
