(;GM[1]FF[4]SZ[19]
GN[Mistake in the follow-up move]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem4/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem4/Solution

Mistake in the follow-up move]
PL[W]

AB[bp][cp][dq][eq][gq][fr]
AW[bq][cq][dr][er]

;W[br]C[W1]MN[1]
;B[aq]C[B2]MN[2]
;W[cs]C[W3]MN[3]
;B[ar]C[B4]MN[4]
;W[es]C[W5]MN[5]
;B[bs]C[B6]MN[6]

;
)
