(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]
AW[cp][dp][bq][cq][eq][dr][fr][fs]AB[bo][co][do][eo][bp][ep][fq][gq][br][gr][bs][gs]C[Black's move, your task is to kill the group of whites in the corner]
(;B[ds]
;W[er]
(;B[aq]
;W[cr]
(;B[cs]C[Excellent! RIGHT])
(;B[ar]
;W[cs])
(;B[ap]
;W[cs]))
(;B[cr]
;W[ar]C[It is only seki])
(;B[ar]
;W[cr]
(;B[cs]
;W[aq]
;B[ap]C[It is only seki])
(;B[aq]
;W[cs]))
(;B[cs]
;W[ar]
(;B[ap]
;W[aq]
;B[cr]C[It is only seki])
(;B[cr]C[It is only seki])))
(;B[aq]
;W[cr]
(;B[cs]
;W[ds])
(;B[ds]
;W[cs])
(;B[es]
;W[er]
(;B[cs]
;W[ds])
(;B[ds]
;W[cs])))
(;B[es]
;W[er]
(;B[cr]
;W[ar]
(;B[ap]
;W[aq]
(;B[ds]
;W[cs]
;B[ds]C[It is only seki])
(;B[as]
;W[cs]))
(;B[ds]
;W[cs]
(;B[ds]C[It is only seki])
(;B[ap]
;W[as])
(;B[aq]
;W[as])))
(;B[aq]
;W[cr]
(;B[cs]
;W[ds])
(;B[ds]
;W[cs])))
(;B[cr]
;W[ar]
(;B[ds]
;W[er]C[It is only seki])
(;B[ap]
;W[aq]
(;B[ds]
;W[er]C[It is only seki])
(;B[as]
;W[cs])
(;B[er]
;W[es]
;B[ds]
;W[cs]C[It is only ko]))
(;B[er]
;W[es]
(;B[ap]
;W[aq]
;B[ds]
;W[cs]C[It is only ko])
(;B[ds]
;W[cs]C[It is only ko])))
(;B[cs]
;W[ds]
(;B[aq]
;W[ar])
(;B[cr]
;W[ar]))
(;B[ar]
;W[cr]
(;B[cs]
;W[ds])
(;B[ds]
;W[cs])))