(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]
PW[Yuki Satoshi]PB[Imamura Toshiya]WR[9p]BR[9p]DT[2009-06-18]EV[65th Honinbo the last preliminary tournament]RE[W+Resign]
;B[pd]C[This is the game from the 65th Japanese Honinbo. Black is Imamura Toshiya, 9-dan. White is Yuki Satoshi, 9-dan (both from Kansai Kiin)]
;W[dc]
;B[dq]
;W[pp]
;B[ce]
;W[dn]
(;B[cl]C[Black may defend the corner as well -]
(;W[fp]LB[dp:A][ep:B]C[It's a joseki. Other options are A or B -]
(;B[do]LB[cp:A]C[Black may also defend the corner at A -]
;W[eo]
;B[co]
(;W[cn]LB[el:A][fm:B][eq:C]C[A new move. Normally White plays at A, B or C -]
(;B[en]C[Black's cut looks natural -]
;W[dl]
;B[fn]
;W[bo]
;B[bp]
;W[bn]
(;B[fo]C[The most active way -]
;W[ep]
;B[gp]
;W[gq]
;B[hq]
;W[fq]
;B[hr]
(;W[cq]C[A tesuji -]
;B[bq]
;W[cr]
(;B[cp]C[The only one -]
;W[dr]
;B[er]LB[br:A]C[Is it better to start at A?]
;W[fr]
;B[dp]
;W[eq]
;B[br]
(;W[es]LB[bs:A][cs:B]C[If White plays at A, Black can sacrifice the stone at B]
(;B[gs]LB[dm:A][cs:B]C[It's the losing move.
There are 2 ways to think about: A and B.
Both results are seki for Black and the straight move at A gives Black better position
]
;W[cs]LB[bs:A][fs:B]C[A-B are miai, which means that Black's corner is dead.
Imamura Toshiya, 9-dan resigned here.

My conclusion: C6 is a very interesting idea. For sure, Yuki, 9-dan prepared it before the game])
(;B[cs]
;W[bs]
;B[as]
;W[aq]
;B[gs]
;W[fs]
;B[ap]
;W[em]
;B[ho]
;W[ci]
;B[nq]
;W[qn]
;B[gc]
;W[ed]
;B[jc]LB[ds:A]C[The result would be slightly favorable for White, but playable
Also there is a ko adji at A. If White has more threats, he can start the ko.])
(;B[dm]C[This move looks like a tesuji, but it's not making the corner race better]
(;W[em]C[White must not fight here]
;B[cm]
;W[go]
;B[fm]
;W[hp]
;B[kq]C[The trade would be very bad for White])
(;W[cm]
;B[em]
;W[ck]
;B[bl]
;W[bk]
;B[el]
;W[dk]
;B[ao]
;W[al]
;B[an]
;W[bm]
;B[cs]
;W[bs]
;B[gs]
;W[fs]
;B[as]
;W[aq]
;B[ap]
;W[hp]
;B[go]
;W[ip]C[The result is still seki, but now Black is very weak outside, so this plan is wrong for Black])))
(;W[bs]
;B[cs]))
(;B[dr]
;W[dp]
;B[cp]
;W[br]C[Black's group would be killed]))
(;W[dp]
;B[cp]
;W[cq]
;B[bq]
;W[cr]
;B[br]
;W[dr]
;B[fr]
;W[er]
;B[gr]
;W[eq]
;B[bs]C[Black would win the race]))
(;B[br]
;W[eq]
;B[dr]
;W[hp]C[This result would be favorable for White]))
(;B[bn]
;W[bm]
;B[bo]
;W[cm]
;B[ch]
;W[er]
;B[dr]
;W[dl]C[It would be passive for Black to defend like this]))
(;W[fm]
;B[cn]
;W[eq]
;B[dr]
;W[mq]C[This is the most common development])
(;W[eq]
;B[dr]
;W[mq]LB[fm:A][cn:B]C[White can skip the A-B exchange as well]))
(;B[cp]
;W[eo]
;B[fr]
;W[gq]
;B[bn]C[It's a joseki too]))
(;W[cq]C[Usually White can attach here, but now it's risky]
;B[dp]
;W[cp]
;B[co]
;W[do]
;B[cn]TR[cl]C[C8 stone helps Black a lot]))
(;B[co]
;W[di]
;B[fe]
;W[gc]
;B[cn]
;W[dl]C[The fuseki would be equal]))
