(;GM[1]FF[4]SZ[19]
GN[Snapback]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem113/Solution]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem113/Solution

Snapback]
PL[B]

AB[la][ra][kb][mb][ob][rb][jc][mc][qc][nd][od][qd][oe][re][nf][of][pf][qf][qg][rh][ri]
AW[ma][na][pa][qa][nb][qb][nc][oc][pc][rc][md][pd][me][ne][qe][mf][mg][ng][og][pg][qh][qi][qj][rj]

;B[rd]C[B1]MN[1]
;W[sc]C[W2]MN[2]
;B[sd]C[B3]MN[3]
;W[rf]C[W4]MN[4]

;
)
