(;GM[1]FF[4]SZ[19]
GN[Mistake at 1]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem21/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem21/Solution

Mistake at 1]
PL[W]

AB[nb][ob][mc][md][qd][rd][oe][qf]
AW[pb][sb][nc][oc][qc]
CR[nb][ob]
LB[mb:a]

;W[ra]C[W1]MN[1]
;B[rc]C[B2]MN[2]
;W[rb]C[W3]MN[3]
;B[pa]C[B4]MN[4]
;W[qa]C[W5]MN[5]
;B[na]C[B6]MN[6]
;W[oa]C[W7]MN[7]

;CR[nb][ob]
LB[mb:a]
)
