(;GM[1]FF[4]SZ[19]
GN[Black gets a ko]
PC[http://senseis.xmp.net/?OD1PAug4Problem/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?OD1PAug4Problem/Solution

Black gets a ko]
PL[B]

AB[dp][ep][dq][fq][gq][hq][iq][cr][dr][cs]
AW[co][do][eo][cp][fp][gp][hp][ip][jp][cq][jq][br][ir][jr][bs][gs]
LB[ds:a][hs:b]

;B[er]C[B1]MN[1]
;W[es]C[W2]MN[2]
;B[fs]C[B3]MN[3]
;W[fr]C[W4]MN[4]
;B[gr]C[B5]MN[5]
;W[hr]C[W6]MN[6]

;LB[ds:a][hs:b]
)
