(;GM[1]FF[4]SZ[19]
GN[Ko or double damezumari]
PC[http://senseis.xmp.net/?GokyoSeimyoVolume3Problem4/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoSeimyoVolume3Problem4/Attempts

Ko or double damezumari]
PL[W]

AB[ap][bp][cq][eq][fq][br][dr][fr][gr]
AW[ao][bo][co][cp][dp][ep][fp][gp][dq][gq][iq][er][hr]
LB[es:a]

;W[bs]C[W1]MN[1]
;B[cr]C[B2]MN[2]
;W[bq]C[W3]MN[3]
;B[aq]C[B4]MN[4]
;W[ar]C[W5]MN[5]

;LB[es:a]
)
