(;GM[1]FF[4]SZ[19]
GN[Variation 1]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem13/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem13/Solution

Variation 1]
PL[W]

AB[qa][nb][nc][nd][pd][qe][qf]
AW[rb][oc][pc][qc]

;W[ob]C[W1]MN[1]
;B[oa]C[B2]MN[2]
;W[pa]C[W3]MN[3]
;B[pb]C[B4]MN[4]
;W[ra]C[W5]MN[5]
;B[rd]C[B6]MN[6]

;
)
