(;GM[1]FF[4]SZ[19]
GN[W cannot approach B7 from either side; B@a next captures the corner]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem140/Attempts]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem140/Attempts

W cannot approach B7 from either side; B@a next captures the corner]
PL[B]

AB[ka][ib][lb][qb][hc][lc][oc][qc][rc][gd][hd][kd][pd][he][ke][le][me][ne][oe][pe][qe][re][se][if][jf][kf]
AW[ja][jb][mb][pb][rb][sb][dc][fc][gc][jc][kc][mc][pc][sc][fd][jd][ld][md][nd][od][qd][rd][sd][ge][je][gf][hg][kg][lg][ng][pg][rg][ih][qh]
LB[ra:a]

;B[ma]C[B1]MN[1]
;W[na]C[W2]MN[2]
;B[nb]C[B3]MN[3]
;W[la]C[W4]MN[4]
;B[oa]C[B5]MN[5]
;W[kb]C[W6]MN[6]
;B[qa]C[B7]MN[7]

;LB[ra:a]
)
