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Sep-26-06
 | | Domdaniel: GM & CC games remaining after 11.a5
whiteshark: To summarize 5 GM games with 11... a5 Nf6 left - here are the links:
- Lutz vs Epishin, 2001:
http://www.chessgames.com/perl/nph-...
- Korneev vs Landa, 2002:
http://www.chessgames.com/perl/nph-...
- Golubov vs Epishin, 2003:
http://www.chessgames.com/perl/nph-...
- Kasimdzhanov vs Lutz, 2005:
http://www.chessgames.com/perl/nph-...
- Dervishi vs Epishin, 2005:
http://www.chessgames.com/perl/nph-...
and 2 cc-games:
(Johansen,John Martin (2270) - Iotov,Valentin Dimitrov (2488) [B42] EU/MSM/VII/prel1–3 ICCF webserver, 20.12.2005 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Bc5 6.Nb3 Be7 7.Qg4 g6 8.Qe2 d6 9.0–0 Nd7 10.a4 Ne5 11.a5 Nf6 12.Bg5 Bd7 13.Nc3 Bc6 14.Nd4 Qc7 15.f4 Nxd3 16.Qxd3 h6 17.Bh4 g5 18.fxg5 hxg5 19.Bxg5 Ng4 20.Bxe7 Qxe7 21.h3 Ne5 22.Qe3 0–0–0 23.Nxc6 Nxc6 24.Na4 Kb8 25.Nb6 Rh5 26.Nc4 Qc7 27.Qb6 Qe7 28.Qf2 f5 29.Qe2 Qg5 30.exf5 Rxh3 31.Qd2 Qg8 32.fxe6 Rh4 33.Rf4 Rh6 34.Re1 Rxe6 35.c3 Rh6 36.Qe3 Qh8 37.Ref1 d5 38.Nb6 Qh7 39.Kf2 Nxa5 40.Rd1 Rhd6 41.c4 Nxc4 42.Nxc4 dxc4 43.Rxd6 Rxd6 44.Rxc4 Qf5+ 45.Rf4 Qc2+ 46.Kg1 Rd1+ 47.Kh2 Qh7+ 48.Qh3 Qc7 49.Qg3 Ka7 50.Qe3+ b6 51.b4 Qd6 52.Qe4 a5 53.bxa5 bxa5 54.Qe3+ Ka6 55.Qe2+ Kb6 56.Qe3+ Kb5 57.Qb3+ Ka6 58.Qc4+ Kb6 59.Qb3+ ½–½ Vitkevicius,Juozas (2311) - Bucinskas,Valdas [B42]
Lithuania Cht–17 bd3 ICCF, 10.10.2004
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Bc5 6.Nb3 Be7 7.Qg4 g6 8.Qe2 d6 9.0–0 Nd7 10.a4 Ne5 11.a5 Nf6 12.Bh6 Nfg4 13.Bg7 Rg8 14.Bxe5 Nxe5 15.Nc3 Bd7 16.f4 Nc6 17.Qd2 Qc7 18.Na4 0–0–0 19.Nb6+ Kb8 20.Be2 g5 21.f5 g4 22.Qc3 Ne5 23.Qxc7+ Kxc7 24.Nd4 Bg5 25.Ra3 Bd2 26.Nxd7 Kxd7 27.Rd1 Bf4 28.g3 Bg5 29.Kf2 Ke7 30.Rb3 Rd7 31.h3 gxh3 32.Rh1 h6 33.Rxh3 Rc8 34.c3 Nc4 35.Bg4 Ne3 36.Be2 e5 37.Nf3 Ng4+ 38.Ke1 Nf6 39.Rb4 Rc5 40.Nxg5 hxg5 41.Ra4 d5 42.exd5 Rcxd5 43.g4 e4 44.c4 Rd2 45.Rb4 Rc2 46.Rc3 Rxc3 47.bxc3 Kd6 48.Kd2 Kc7+ 49.Ke3 Re7 50.Rb1 Re5 51.Ra1 Nd7 52.Bd1 f6 53.Bc2 Re7 54.Bd1 Rh7 55.Be2 Nc5 56.Rb1 Rd7 57.Rh1 b6 58.axb6+ Kxb6 59.Rh8 Kb7 60.Rf8 Rd6 61.Rf7+ Kb6 62.Rf8 Na4 63.Rb8+ Kc5 64.Rc8+ Rc6 65.Re8 Nxc3 66.Bf1 Na4 67.Kxe4 Nb6 68.Re6 a5 69.Be2 a4 70.Kd3 Nd7 71.Rxc6+ Kxc6 72.Kc3 Kc5 73.Bd1 a3 74.Be2 Ne5 75.Kb3 Kd4 76.Kxa3 Ke3 77.Bd1 Nxc4+ 78.Kb4 Ne5 79.Kc5 Kd2 80.Ba4 Nxg4 81.Bc6 Ne5 82.Ba8 g4 83.Kd6 g3 84.Ke6 Ng4 0–1 |
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| Sep-26-06 | | RonB52734: <Domdaniel> somehow, your game links got broken. C Lutz vs Epishin, 2001
O Korneev vs K Landa, 2002
M Golubev vs Epishin, 2003
Kasimdzhanov vs C Lutz, 2005
and lastly, E Dervishi vs Epishin, 2003, which has Nc3 instead of 0-0 |
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Sep-26-06
| | Domdaniel: Thanks, Ron.
My links were indeed broken. I was trying to escape. Cast off my chains. Be free. There must be some way out of here...It's OK. It'll pass. |
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Sep-27-06
| | Domdaniel: FORUM news.
We'll be hosting 12.Be3 here.
Marker diagram to follow. |
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Sep-27-06
| | Domdaniel: Marker Diagram
Position after suggested 12.Be3
click for larger view |
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Sep-27-06
| | Domdaniel: Prelim note on 12.Be3
This move develops a piece, and takes aim at the square b6, already weakened by Black's ...a6 and our pawn advance to a5.
Invasion and occupation via b6 is one of our possible plans.
12.Be3 also makes the freeing move 12...d5 effectively unplayable for Black.
The Be3 also supports important squares like d4 (where we may want to position a piece) and increases our control of the centre.
His most likely response is 12...O-O, allowing us to continue our development.
More to follow. |
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Sep-27-06
| | Domdaniel: Analysis by Shredder 10 (22-ply, 10 hrs):
(+0.48): 12.Bc1-e3 0-0 13.Nb1-c3 Bc8-d7 14.Be3-g5 Ne5xd3 |
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| Sep-27-06 | | Wassily: Why would we want to move the bishop (again) to g5? |
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| Sep-27-06 | | tor2ga: <Wassily: Why would we want to move the bishop (again) to g5?> Bg5 has cropped up in the lines suggested by machine analyses -- several different programs, starting from a variety of positions. I haven't seen any explanation why Bg5 might be a <good> plan (the machines are mute on this point :-P). It seems very few humans like the move. Perhaps Bg5 provokes Black into an unfavorable pawn-push to drive off the bishop? ... Eh, I really have no idea why the machines like Bg5. |
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Sep-27-06
| | Domdaniel: Rybka, 25-ply, gives this line (courtesy of <Monad>) LINE 12. Be3 O-O 13. Nc3 Bd7 14. f4 Nxd3 15. Qxd3 Qc8 16. e5 Ng4 17. Bd4 dxe5 18. fxe5 f6 (Eval 0,14) |
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| Sep-27-06 | | Wassily: Specifically if we play 12. Be3 and then 14. Bg5, that doesn't make sense to me. |
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| Sep-27-06 | | tor2ga: <Domdaniel: 12.Be3 also makes the freeing move 12...d5 effectively unplayable for Black.> ? This, I don't quite see -- please can you post a strong line against 12...d5? |
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Sep-27-06
| | Domdaniel: <tor2ga> re ...d5 - I've been trusting <Thorsson> on this, as I haven't had time to examine it properly myself yet. I'll post Thorsson's line here and add my own ideas, so do check back later. I agree that it's vital. Thanks. |
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| Sep-27-06 | | Wassily: Yes I would like to see this as well |
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Sep-27-06
| | Domdaniel: <Thorsson> on general development: No. At this point Be3 is best. The threat of Bb6 is strong, even if you are not persuaded that it should be played, and Bh6 is no longer a serious consideration. Perhaps the N can still go to a3, but we should not now shut the door on Nd2 or Nc3. Indeed, with Be3 played, Nd2 appears to be more flexible than Na3 without any downsides. |
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| Sep-27-06 | | cotdt: Yes 12.Be3 does indeed prevent ...d5 because...
13.Bb6! attacks the Q, ...Qd6 (or Qd7)
14.f4! Nxd3 (forced)
15.e5! Qb4 (or Qc6)
16.exf6
and checking this line with Hiarcs, we'll be up by 2 pawns, and probably the victory. |
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Sep-27-06
| | Domdaniel: More on 12.Be3 and ...d5 (from Thorsson)
11.Be3 d5 12.Bb6 Qd7 13.exd5 Nxd3 14.dxe6 seems to indicate that Be3 prevents an immediate d5 too. |
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| Sep-27-06 | | Thorsson: It's clear that Shredder doesn't have a clue here.
I'm wondering if we can play 12.Be3 0-0 13.N1d2 Bd7 14.Nc4 I've now come to the conclusion that Bb6 before Bd7 is no good except as a tactical shot because Black will be able to play Nfd7. |
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| Sep-27-06 | | Thorsson: <cotdt: Yes 12.Be3 does indeed prevent ...d5 because...
13.Bb6! attacks the Q, ...Qd6 (or Qd7)
14.f4! Nxd3 (forced)
15.e5! Qb4 (or Qc6)
16.exf6>
This line does not work after 13...Qd7 |
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| Sep-27-06 | | cotdt: yeah but it's already been shown a couple posts above that 13...Qd7 has its own problems |
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Sep-27-06
| | Domdaniel: A line from <djmercury> djmercury: 12. Be3 0-0 13. f4 Nxd3 14. Qxd3 Bd7 15. Nc3 .... This line looks good for white, black doesn't look to have special counter opportunity. |
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Sep-27-06
| | Domdaniel: Is Black's Bd7-b5 a threat?
<djmercury> and <thorsson> say this:Thorsson: <djmercury: A coming N1d2 is not the best move for white, because black can get the bishop to b5 (with Nc3 he will not play Bb5) and after Nxd3 the bishop in that position would be really annoying. If you want to play N1d2 in the next moves, you have to find a way to prevent Bd7-b5 or a move order that doesn't make that bishop move a threat.> It's not really a threat at all. 12.Be3 0-0 13.N1d2 Bd7 14.Nc4! Nxd3 (14...Bb5?! 15.Nxe5!) 16.cxd3 Bb5?! 16.Nb6! |
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Sep-27-06
| | Domdaniel: <kwgurge> adds this on the ...Bb5 idea: kwgurge: <djmercury> If black tries to play the B to b5, Nc3d4 allows us to trade a N for it or causes its retreat with loss of tempo to d7 further congesting black's position and placing or somewhat out of the way b-file N on a better square. Also black's B can only go to b5 if he takes our Bd3 with his knight which would give us control of the c-file with rooks after cxd3. |
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Sep-27-06
| | Domdaniel: <marvol> and <willem wallekers> on some positional ideas with 12.Be3: <Willem Wallekers: I think - at this time, not 100% sure yet - that after 11 ... Nf6 it's wise to play Be3 first iso Nc3.> Marvol: I fully agree with that (also with the not being sure bit :p). It seems to me that the bishop is most useful on e3, while the knight is unclear, a3 c3 and d2 all being possible. It (12.Be3) vacates the c1-square for a rook although I think we would anyway prefer the a1 rook to go there if need be. In any case, should we want to pressurise down the c-file we may not want to have to remove the knight from c3 again first. Moreover, after Be3, Nd2 becomes a viable option as it doesn't block the bishop anymore. On d2 this knight is more flexibly placed than on a3 - it can not only hop to c4 just as easily but also (after an f4) to f3 to strengthen the kingside. |
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Sep-27-06
| | Domdaniel: This is my own.
After 12.Be3 d5 looks completely unplayable, to my eyes. 13.Bb6 Qd7 14.exd5 Nxd3 15.dxe6! is practically winning, and there are other lines as well. White follows with 16.Qxd3 or cxd3 (whichever keeps queens on) and then develops the Nb1 - this being one of the positions where Nb1-c3 could be good.
I wouldn't worry about 12...d5 - a different matter in the future, though. |
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