(;GM[1]FF[4]SZ[19]
GN[Variation at 4]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem81/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem81/Solution

Variation at 4]
PL[W]

AB[kc][lc][qc][rc][md][nd][pd][oe][qe]
AW[qb][nc][oc][pc][od]

;W[rb]C[W1]MN[1]
;B[sb]C[B2]MN[2]
;W[mb]C[W3]MN[3]
;B[ob]C[B4]MN[4]
;W[pb]C[W5]MN[5]
;B[oa]C[B6]MN[6]
;W[ra]C[W7]MN[7]
;B[pa]C[B8]MN[8]
;W[lb]C[W9]MN[9]
;B[kb]C[B10]MN[10]

;
)
