(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PB[Black to play]C[Just play through the moves to move 26 which is the problem position. These do not represent a game sequence!]
;B[bp]
;W[bq]
;B[cp]
;W[cq]
;B[cn]
;W[dp]
;B[bm]
;W[do]
;B[dm]
;W[dn]
;B[em]
;W[en]
;B[fm]
;W[fo]
;B[fn]
;W[fp]
;B[go]
;W[ep]
;B[gp]
;W[]
;B[fq]
;W[]
;B[gr]
;W[]
;B[hq]
;W[]C[This is the problem position. Black to play.]
(;B[dr]C[If black tries to peep at the cutting point...]
;W[dq]
;B[cr]
;W[br]
;B[er]
;W[bs]C[White gets a second eye in the corner.])
(;B[dq]
;W[eq]
;B[dr]
;W[er]
;B[cr]
;W[br]C[Clearly playing the cut does not work.])
(;B[br]C[Correct: this is the move that annoys white.]
(;W[ar]C[This is his strongest reply]
;B[dr]
(;W[cr]
;B[dq]
;W[bs]C[White can live small in the corner in gote, losing
the other 7 stones.])
(;W[dq]
;B[cr]C[If white tries to save all, then all die.]))
(;W[cr]C[This response loses all]
(;B[aq]
(;W[eq]C[White loses if he does this]
;B[er]
;W[dr])
(;W[cs]
;B[ar]
;W[er]
;B[eq]
;W[dq]
;B[es]
;W[fs]
;B[fr]
;W[ds]C[This way white just lives so black had better be careful]))
(;B[er]C[This is blacks strongest move.]
(;W[dr]
;B[aq]C[Black easily stops a second eye.])
(;W[ar]
(;B[dq]
;W[bs]C[Again white can live small in the corner])
(;B[bs]
;W[dr]C[Black can't get all this way.]))))))
