(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Chinese]SZ[19]KM[7.50]TM[3000]OT[3x30 byo-yomi]
GN[The Cup of consul general of China in Saint-Petersburg]PW[Kashaev Andrey]PB[Alexander Dinershteyn]WR[5d]BR[7d]DT[2015-02-07]EV[2 board]RO[3]PC[Saint-Petersburg]WT[Moscow]BT[Kazan]
;B[dc]
;W[pp]
;B[qd]
;W[dp]
;B[ce]
;W[od]
;B[oe]C[I will show you the game, played in the Chinese Consulate General Cup in S-Petersburg
http://www.europeangodatabase.eu/EGD/Tournament_Card.php?&key=T150207F&pin=10313237
It was the strongest tournament in the history of Russian Go.
A Chinese 6-dan pro got 7th place with a 3-3 score!]
(;W[ne]
(;B[of]
;W[pd]
;B[qe]
(;W[qc]C[Andrey Kashaev, 5d (Moscow) decided to play this complicated joseki -]
;B[nd]C[Now it's much more complicated]
;W[nc]
;B[md]
;W[mc]
;B[ld]
;W[lc]
;B[kd]
(;W[pe]C[White can still keep it simple, but in the game white went for the more complicated variation]
;B[pf]
;W[qf]
(;B[rc]C[The corner is too big to sacrifice now]
;W[pb]
(;B[ob]C[I will show you this new idea. It's a very clever probe and I won my game because of this move

It's not a move I invented. It was first tried in Japan around 1950, but it's hard to read about it in any Go books and joseki dictionaries]
(;W[oc]C[White's answer in the real game is bad]
;B[qb]
;W[pc]
;B[rf]
;W[qg]
;B[rg]
;W[qh]
;B[rb]
(;W[ng]LB[jb:A][jc:B]C[It' a joseki, but maybe better for White to jump at A or B
He can prevent the painful block in sente -]
;B[nf]
;W[mf]
;B[mg]
;W[og]
;B[me]
;W[lf]
;B[kc]C[So painful!]
;W[kb]
;B[jb]
;W[la]LB[ob:A][oc:B]C[Now we can see that A-B exchange is great for Black]
;B[mh]
;W[pg]
;B[ne]
;W[jf]
;B[id]
;W[mj]
;B[kh]
;W[kj]
;B[ih]
;W[np]C[Black got too many points!]
;B[pa]
;W[nb]
;B[oa]
;W[qa]
;B[ra]
;W[na]
;B[qa]
;W[mb]
;B[ni]
;W[pj]
;B[nj]
;W[nk]
;B[hj]C[Black has solid moyo. 3 stones are almost dead. But White's moyo is full of holes
Black is clearly ahead here.
Later I won this game without any problems
My new move at P18 was successful!]
;W[ci]
;B[ck]
;W[cf]
;B[de]
;W[be]
;B[bd]
;W[ej]
;B[ek]
;W[fk]
;B[fj]
;W[dk]
;B[el]
;W[dj]
;B[dl]
;W[cl]
;B[cm]
;W[bl]
;B[dn]
;W[bk]
;B[ja]
;W[ka]
;B[fi]
;W[co]
;B[gm]
;W[jq]
;B[qp]
;W[qo]
;B[ro]
;W[rp]
;B[qq]
;W[rq]
;B[po]
;W[qn]
;B[pq]
;W[rr]
;B[op]
;W[nq]
;B[ok]
;W[oj]
;B[qm]
;W[rn]
;B[ol]
;W[nl]
;B[om]
;W[ql]
;B[mn]
;W[lm]
;B[ln]
;W[ji]
;B[jh]
;W[li]
;B[lh]
;W[jm]
;B[no]
;W[pn]
;B[on]
;W[kn]
;B[oq]
;W[eg]
;B[ff]
;W[rh]
;B[bf]
;W[bg]
;B[ae]
;W[fp]
;B[rm]
;W[rl]
;B[pm]
;W[so]
;B[sm]
;W[rj]
;B[sn]
;W[ro]
;B[lq]
;W[kp]
;B[qr]
;W[rs]
;B[lp]
;W[kr]
;B[cq]
;W[dq]
;B[dr]
;W[er]
;B[bp]
;W[br]
;B[bn]
;W[bo]
;B[ao]
;W[bq]
;B[lr]
;W[hn]
;B[gn]
;W[go]
;B[hm]
;W[im]
;B[kq]
;W[jr]
;B[ik]
;W[lo]
;B[mo]
;W[ko]
;B[jk]
;W[mr]
;B[ll]
;W[or]
;B[mp]
;W[mm]
;B[kl])
(;W[jc]
;B[oh]
;W[pj]C[I think, it's better for W, comparing to the real game]))
(;W[pc]C[This move is almost the same as White's answer in the real game]
;B[rf]
;W[qg]
;B[rg]
;W[qh]
;B[rb]
;W[ng]
;B[nf]
;W[mf]
;B[mg]
;W[og]
;B[me]
;W[lf]
;B[kc]
;W[kb]
;B[jb]
;W[la]LB[pa:A]C[Later A is possible, so White can only live with 2 points, like in the real game]
;B[pa]C[This move connects black.]
;W[qa]
;B[oa]
;W[nb]
;B[qb]
;W[oc]
;B[ra]
;W[na]
;B[qa]
;W[mb]C[Painful for white])
(;W[oa]C[Possible, but ...]
;B[rf]
;W[qg]
;B[rg]
;W[qh]
;B[qb]
;W[pc]
;B[ra]LB[pa:A]C[Black can get a ko fight at A later.
It's dangerous for White])
(;W[rb]C[A good move!]
;B[oc]
;W[pc]
;B[pa]
;W[qb]
;B[qg]
;W[rf]
;B[rg]
;W[rd]
(;B[oh]LB[kc:A]C[White may consider this.
The result is similiar to a variation we saw before,
with one big difference.
Later the block at A is sente for black.

White however has time to push at A now in double sente.]
;W[kc]
;B[jd]
(;W[ic]C[Jumping here is huge.]
;B[pn]
;W[np]
;B[sf]
;W[re]
;B[nn]C[The result is equal.])
(;W[pn]
;B[jc]C[Not only is this move big in itself, but it also gives black a big sente follow-up again.]
;W[oq]
;B[kb]SQ[pa][ob][oc]C[This hane is sente once again. 
This is a perk of the marked sacrificed stones. Yes, you heard it, a perk.]))
(;B[kc]C[Black wants to get this block as soon as possible, but he has no time now]
;W[pg]C[White can ignore it and cut. Would be hard for Black to answer this cut])))
(;B[rf]C[The normal joseki]
;W[qg]
;B[rg]
;W[qh]
;B[qb]
;W[pc]
;B[rb]
;W[ng]
;B[nf]
;W[mf]
;B[mg]
;W[og]
;B[me]
;W[lf]
;B[kc]
;W[kb]
;B[jb]
;W[la]C[It's a classic joseki.
White has 6 points on the top.
Because of a special move in the game this turned into 2 points instead!
Big difference!]))
(;B[qg]C[Black can not play like this]
;W[rf]
;B[rg]
;W[rd]
;B[oh]C[It's a joseki, but works only in special cases. Locally White is favorable]))
(;W[rc]
(;B[oc]C[This clever probe is painful]
(;W[ob]
;B[cn]LB[pe:A]C[Black protected the cutting point at A in sente])
(;W[pc]
;B[kc]LB[lb:A]C[Now the block is bigger. Black gets a sente bonus move at A later]
;W[dj]
;B[lb]
;W[mb]
;B[kb]
;W[ob]C[Black will get this endgame in sente]))
(;B[kc]LB[oc:A]C[When black blocks without playin the peep at A first..]
;W[dj]
;B[lb]C[This move might not be sente any longer]
;W[mb]
;B[kb]C[White will play tenuki])))
(;W[kd]
;B[qc]TR[dc][ce]C[This is simple and recommended by Alexandre in this case.
Although black gets many solid points white extends towards blacks shimari, which feels good.
White has light shape and sente]))
(;B[pe]C[Also possible]
(;W[md]
(;B[oc]C[Black takes territory]
;W[nc]
;B[ob]C[Joseki]
;W[pc]C[Later there is some aji here for white]
;B[pd]
;W[pb]
;B[nd]C[This ko is huge and hard to fight for white though]
;W[nq]C[White needs to find the first ko threat]
;B[qp]
;W[od]
;B[nb]C[Note that this move is a local ko threat for black. ]
;W[mb]
;B[nd]C[Because of black's local ko threat the ko has become even bigger. When black takes white's stone, it is devestating. That's why it's difficult for white to fight this ko, there is a lot at stake.])
(;B[nf]C[Black can also go for influence]
;W[mf]
;B[mg]
;W[ng]
;B[of]
;W[lf]
;B[lg]
;W[kf]
;B[nh]))
(;W[nd]
;B[pc]
;W[ng]C[Also joseki])))
(;W[qc]C[White also has this move available, which leads to many difficult variations, which we will not go in to further]))
