(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[9]KM[0.00]
PB[Noir]AW[be][ce][ee][fe][gf][hg][hh]AB[bg][cg][fh]
;B[]
;W[dh]C[The obvious vital point]
(;B[eg]C[necessary]
(;W[fi]C[already less obvious]
(;B[eh]C[harder and harder]
(;W[ch]C[going uphill]
(;B[di]C[actually, its a mountain]
(;W[bh]C[now, it is straightforward, except for guessing the end result]
;B[dg]
;W[bi]
;B[gi]C[preparation for chosei]
;W[gh]
(;B[ci]C[forced]
(;W[ei]C[forced again, or else]
;B[di]
;W[fi]
;B[ci]C[Chosei (eternal life) : superko  (like an ordinary  ko for AGA or BGA rules : this move is not allowed , and Black must find the first threat.With japanese rules, the game is voided)])
(;W[hi]
;B[ei]C[Black is alive]))
(;B[ei]
;W[ci]C[Black is already dead]))
(;W[ci]
;B[ei]
;W[bh]
(;B[bi]C[piège facile à réfuter]
(;W[ah]
;B[ag])
(;W[ai]
;B[ag]
;W[ah]
;B[dg]))
(;B[ah]
;W[bi]C[Black is dead])))
(;B[ei]
(;W[dg]C[the only refutation]
;B[df]
;W[ef]
;B[cf]
;W[bh]
;B[ah]
;W[bf])
(;W[bh]
;B[dg]
;W[bi]
;B[ci]
;W[ag]
;B[af]
;W[ah]
;B[di]))
(;B[bh]
;W[ag]
;B[ah]
;W[di]
(;B[ei]
;W[bi]
;B[dg]
;W[ci]
;B[gh]
;W[gi]
;B[hi]
;W[gi])
(;B[bi]
;W[ei]
;B[bf]
;W[af]
;B[ae]
;W[af])))
(;W[ei]
;B[gi]
;W[di]
;B[gh]
;W[dg]
;B[df]))
(;B[gi]
;W[dg]
;B[df]
;W[ef]
;B[cf]
;W[fg]
;B[eh]
;W[gh]
;B[ei]
;W[di])
(;B[ei]
;W[eh]
;B[gi]
;W[dg]
;B[df]
;W[ef]
;B[fg]
;W[cf]
;B[ch]
;W[de]
;B[di]
;W[df])
(;B[dg]
;W[ei]
;B[ch]
;W[di]))
(;W[gh]
;B[eh]
;W[ch]
;B[bh]))
(;B[dg]
;W[eh]
;B[eg]
;W[fg]))
