The Chessgames Challenge

The World vs Natalia Pogonina
C U R R E N T P O S I T I O N

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Can a group of chess amateurs team up to beat a grandmaster? Find out in the Chessgames Challenge! You can vote for the move you think is best, and discuss the game with other members on this page.

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[Natalia Pogonina]

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GAME OVER: 1/2-1/2

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MOVES:
1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Bb4+ 5.Bd2 Be7 6.Bg2 c6 7.O-O O-O 8.Qc2 b6 9.Rd1 Nbd7 10.Bf4 Ba6 11.Nbd2 Rc8 12.Rac1 Nh5 13.Be3 Nhf6 14.Bg5 h6 15.Bxf6 Bxf6 16.b4 Bb7 17.Qb3 Ba8 18.c5 a5 19.a3 Rb8 20.Qc2 Bb7 21.e4 Qc7 22.Nf1 dxe4 23.Qxe4 Rfd8 24.Ne3 Ba6 25.Ng4 Bb5 26.Qc2 axb4 27.axb4 Be7 28.Ra1 h5 29.Ne3 Bf6 30.Ra3 bxc5 31.bxc5 Ra8 32.Rxa8 Rxa8 33.Bf1 Bxf1 34.Kxf1 e5 35.dxe5 Nxe5 36.Qe4 Nd7 37.Qf5 Ra7 38.Qxh5 g6 39.Qg4 Nxc5 40.h4 Ra4 41.Nc4 Qb7 42.Kg2 Qb3 43.Qc8+ Kg7 44.Nd6 Qxd1 45.Ne8+ Kf8 46.Nxf6+ Kg7 47.Ne8+ Kf8 48.Nf6+ Kg7 49.Ne8+ Kf8 50.Nc7+ Kg7 51.h5 Ra1 52.h6+ Kf6 53.Qh8+ Ke7 54.Qe8+ Kd6 55.Qd8+ Nd7 56.Ne8+ Kc5 57.Qe7+ Kb6 58.g4 Ra4 59.Qd8+ Ka6 60.Nf6 Rf4 61.Ne5 Rxf2 62.Kxf2 1/2-1/2
GAME OVER thank you for playing	it is now 07:25:00
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< Earlier Kibitzing · PAGE 1066 OF 1068 · Later Kibitzing>
Mar-01-11		blue wave: Well I'm up to move 34 for white. And as you would expect. There are no signicant errors by either side. And my engine pretty much agrees with all the moves played. At move 34 for white, I'm getting several options. I think 34.Qf2 may be a slight improvement compared to the 34.Kg1 played. hiarcs13.1 Depth : 20/1 Time : 00:08:14 Nodes : 258248603 N/sec : 522470 Score : +0.23 34. Qf2 Qd6 35. fxg6 hxg6 36. Rb5 Re8 37. Kg1 Rd8 38. Qh4 g5 39. Qh5 Be4 40. Rd2 Qe5 Score : +0.03 34. fxg6 hxg6 35. Kg1 f5 36. Qb2 Re3 37. Rb5 f4 38. Rf1 Rg3 39. Rf2 Qd6 40. Rd2 Score : 0.00 34. Nxb3 Rxb4 35. Qxd5 Bxd5 36. Nxc5 Bc4 37. Rd8 Kf7 38. Rd7 Kg8 39. Rc7 Bf7 40. Ne6 Rb8 Score : 0.00 34. Kg1 gxf5 35. Qf2 Qd6 36. Qxf5 Ba6 37. Ra4 b2 38. Rxa6 Qxd4 39. Rxd4 b1=Q 40. Kh2 Qb8 41. Rdd6 Nxa6 42. Qxf6 Qc7 43. Qg5 Kf8 44. Qf5

Mar-01-11		cro777: <blue wave> Thanks. I expected that. I'm also interested how different engines evaluate 31...Re4 compared to 31...Nc5 at different depth.

Mar-01-11		blue wave: Just gone through the whole game with hiarcs13.1. And I'd have to conclude that is understood the unbalanced game very well. There where a few points eg. move 26.fxg6 and move 34.Qf2 that offered a some other playable options for white.

Mar-01-11		Kinghunt: <cro777: <karpkasp: 3... b5 looks like a beginner move> Even world champions sometimes use to play this move. Vladimir Kramnik against Deep Fritz (2006) played: 1.d4 d5 2.c4 dxc4 3.e4 b5 4.a4 c6 with the idea to transpose into rare but playable line of the Slav Defence.> Probably a bad example to counter his point. The game you cite reached the following position after white's 34th move: click for larger view And here Kramnik uncorked the jawdropping 34...Qe3??, losing instantly to 35. Qh7#. So probably not the best game to show why a move Kramnik played is probably good.

Mar-01-11		blue wave: <cro777> For move <31....Nc5> has a slight edge to it. click for larger view hiarcs13.1mp -multiPV[4] Depth : 21/5 Time : 00:35:57 Nodes : 1252751K N/sec : 580640 Score : +0.45 31... Nc5 32. f6 Rd8 33. Rd1 h6 34. Rb5 Rd7 35. h3 Kh7 36. Rc1 Qe4 37. Rbxc5 Rxd4 Score : +0.57 31... Re4 32. h3 Nc5 33. Rd1 f6 34. Kg1 gxf5 35. Qf2 Kf7 36. Rb6 Re8 37. Rd2 Score : +1.81 31... Ne5 32. Rxb3 Rd8 33. f6 Nc4 34. Qf2 Nd6 35. Rb4 Ne4 36. Qf4 Nxf6 37. Rxb7 Qxd4 38. Rb8 Kg7 39. Rxd8 Qxd8 40. Qe5 h6 41. h3 Qb6 42. Rf3 Qc6 43. Qd4 Score : +2.04 31... Ba6 32. Re1 Rxe1 33. Qxe1 Bc4 34. Qc3 Ne5 35. Rb8 Kg7 36. fxg6 fxg6 37. h3 Kf7 38. Rb6 Kg8 39. Nxb3 Nd7 40. Rb4 Qd1 41. Kh2 Qd6 42. g3 Bd5 43. Rf4 Ne5 44. Nd4 Qd8 45. Qc5

Mar-02-11		blue wave: <cro777> Bern-Vukcevic 26.gxf6 offers black a tough game. Heres one line I just played through. Its a complex position so there must be better defense for black. 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5 8. axb5 Bxc3 9. Bxc3 cxb5 10. b3 Bb7 11. bxc4 b4 12. Bb2 Nf6 13. Bd3 Nbd7 14. O-O O-O 15. Nd2 e5 16. d5 Qe7 17. Kh1 Nc5 18. Bc2 Rfe8 19. f4 exf4 20. exf4 Qe2 21. Bd4 Nfd7 22. Qc1 a4 23. Bf5 g6 24. Bxd7 Nxd7 25. f5 Rac8 <26. fxg6 hxg6 27. Qb2 Ba6 28. Rac1 Qd3 29. Rf4 Re2 30. Rh4 f6 31. Bxf6 Rxd2 32. Rh8+ Kf7 33. Rh7+ Kg8 34. Rg7+ Kf8 35. Be7+ Ke8 36. Rg8+ Nf8 37. Rxf8+ Kd7 38. Qa1 Qa3 39. Qxa3 bxa3 40. Rxc8 Kxc8 41. Bxa3 Rd4 42. d6 Rxc4 43. Rxc4+ Bxc4 44. h4 Kd7 45. Kg1 *>

Mar-02-11		AgentRgent: <Kinghunt: And here Kramnik uncorked the jawdropping 34...Qe3??, losing instantly to 35. Qh7#. So probably not the best game to show why a move Kramnik played is probably good.> True, but after 34...Kg8 the game is dead even, which is nothing to sneeze at vs Deep Fritz. I don't think 3...b5 can really be blamed for a howler on move 34...

Mar-02-11		Kinghunt: <True, but after 34...Kg8 the game is dead even, which is nothing to sneeze at vs Deep Fritz. I don't think 3...b5 can really be blamed for a howler on move 34...> Such was never my intent. I was simply pointing out that just because Kramnik plays a move doesn't mean it's good, and that to see that, you don't have to look farther than that same game.

Mar-02-11		cro777: <blue wave> Thank you for the analysis. A comparison with other engines is my next step.

Mar-02-11		cro777: <Kinghunt: I was simply pointing out that just because Kramnik plays a move doesn't mean it's good, and that to see that, you don't have to look farther than that same game.> An interesting debate. You are right, but I didn't say that the line was good. I was simply pointing out that the line was sometimes played even by the elite players (although it looks like a beginner's move). The move 3...b5 has never been considered seriously, but Black has chances to transpose into playable lines. The position in Kramnik�s game is usually reached by: 1.d4 d5 2.c4 c6 3.Nc3 dxc4 4.e4 b5 5.a4 It is Slav Defence: 3 �dxc4 (without early 3.Nf3) and 3.Nc3. Recently, GM Nikita Vitiugov use to play this line. He won the game against GM Akobian at the World Team Championship 2010. Kramnik outplayed Deep Fritz in the opening in that game, but later went astray. 1d4 d5 2. c4 dxc4 3. e4 b5 4. a4 c6 5. Nc3 b4 6. Na2 Nf6 7. e5 Nd5 8.Bxc4 e6 9. Nf3 a5 10. Bg5 Qb6 11. Nc1 Ba6 12. Qe2 h6 13. Be3 Bxc4 14. Qxc4 Nd7 15. Nb3 Be7 16. Rc1 O-O 17. O-O Rfc8 18. Qe2 c5 19. Nfd2 Qc6 20. Qh5Qxa4 21. Nxc5 Nxc5 22. dxc5 Nxe3 23. fxe3 Bxc5 24. Qxf7+ Kh8 25. Qf3 Rf826. Qe4 Qd7 27. Nb3 Bb6 28. Rfd1 Qf7 29. Rf1 Qa7 30. Rxf8+ Rxf8 31. Nd4 a4 32. Nxe6 Bxe3+ 33. Kh1 click for larger view Black stands clearly better here. Instead of 33�Bxc1 he should have played 33�Re8 and if 34.Rf1 then 34�Qa6. All this doesn�t mean that the line is good. But it is not that bad too.

Mar-02-11		AgentRgent: <Kinghunt: Such was never my intent.> I understand that. <I was simply pointing out that just because Kramnik plays a move doesn't mean it's good, and that to see that, you don't have to look farther than that same game.> I just don't see how the finish of that game does anything to counter the idea (fallacious or not) that if "Kramnik plays a move it's good". Just because Kramnik lost to a huge blunder much later doesn't mean the move WASN'T good (if in fact is was).

Mar-02-11		cro777: <blue wave: <cro777> Bern-Vukcevic 26.fxg6 offers black a tough game.> After 26. fxg6 hxg6 27. Qb2 Ba6 28. Rac1, instead of 28...Bd3, the best for Black seems to be 28...Bxc4 28...Bxc4 29.Nxc4 Qxb2 30.Bxb2 Rc5 with fully equal chances. Ivar Bern didn't play 26.fxg6 probably because of that line. A typical example of dynamic chess, totally unbalanced position but completely equal chances.

Mar-02-11		blue wave: <cro777> Just saw your assessment of 26.fxg6. 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5 8. axb5 Bxc3 9. Bxc3 cxb5 10. b3 Bb7 11. bxc4 b4 12. Bb2 Nf6 13. Bd3 Nbd7 14. O-O O-O 15. Nd2 e5 16. d5 Qe7 17. Kh1 Nc5 18. Bc2 Rfe8 19. f4 exf4 20. exf4 Qe2 21. Bd4 Nfd7 22. Qc1 a4 23. Bf5 g6 24. Bxd7 Nxd7 25. f5 Rac8 26. fxg6 hxg6 27. Qb2 Ba6 28. Rac1 Bxc4 29. Nxc4 Qxb2 30. Bxb2 Rc5 * click for larger view hiarcs13.1 Depth : 23/1 Time : 00:25:38 Nodes : 1095365K N/sec : 711915 Score : +0.89 31. Nd6 Rxc1 32. Rxc1 Re2 33. Ba1 a3 34. Nb5 b3 35. Nxa3 b2 36. Bxb2 Rxb2 37. Nc4 Rb8 38. Re1 Rc8 39. Na5 Kg7 Score : +0.87 31. d6 a3 32. Nxa3 Rxc1 33. Rxc1 bxa3 34. Bxa3 f5 Score : +0.70 31. Rfd1 Ra8 32. d6 a3 33. Bd4 Rc6 34. Nd2 Rxd6 35. Nb3 Nf8 36. Be5 Rxd1 37. Rxd1 f5 38. Kg1 a2 39. Bb2 Score : +0.51 31. Kg1 Rxd5 32. Ba1 f5 33. Rb1 b3 34. Bb2 Re4 35. Rfc1 Rc5 36. Rd1 Rexc4 37. Rxd7 Rc7 38. Rd6 Kh7 39. Ba3 Kg7 40. Re1 Rc2 Maybe my chess engine is missing something? Where is the full equality? I think white has the advantage.

Mar-02-11		Kinghunt: <I just don't see how the finish of that game does anything to counter the idea (fallacious or not) that if "Kramnik plays a move it's good". > Kramnik played 34...Qe3. 34...Qe3 was not a good move. Therefore, not all moves that Kramnik plays are good. Though I do have to admit, in this case I see no problem with the move. I can't find a way for white to force a transposition into any inferior line, and black does get a perfectly playable game. But the proof of that is in the analysis, rather than in Kramnik playing it.

Mar-02-11		cro777: <Kinghunt: But the proof of that is in the analysis, rather than in Kramnik playing it.> I agree completely. I mentioned Kramnik only in the sense: "altough this move looks like a beginner's move it is sometimes played even by Kramnik (as a former world champion)".

Mar-02-11		cro777: <karpkasp: The QGA offers some unbalanced variations too. 1. d4 d5 2. c4 dxc4 3. e4 b5!? 4. a4 c6 5. axb5 cxb5 6. Nc3 Bd7 7. Bf4 or 7. d5 3... b5 looks like a beginner move, but is included in computers opening books. I find this move dubious but it has been played recently.> <karpkasp: or directly 1. d4 d5 2. c4 c6 3. Nc3 dxc4!? > Thank you for calling attention to interesting sidelines of the mainstream openings. <1.d4 d5 2.c4 c6 3.Nc3 dxc4 4.e4 b5 5.a4> or 1.d4 d5 2.c4 dxc4 3.e4 b5 4.a4 c6 5.Nc3 This variation of the Slav Defence (which can be reached, by transposition, from the QGA) may lead to positions that remind the Noteboom variation. <5�b4 6.Na2 Nf6 7.e5 Nd5 8.Bxc4 e6 9.Nf3 a5> click for larger view In the correspondence chess, at the 18th ICCF Olympiad (Preliminaries) 2009, in the game Guevara-Rydholm there followed: <10. Ng5> (10.Bg5 is more usual as in the game Deep Fritz-Kramnik) <Be7 11. Ne4 O-O 12. O-O Nd7 13. b3 c5 14. Bb2 Ba6 15. Rc1 Bxc4 16. Rxc4 Rc8 17. Qe2 N5b6 18. Rcc1 c4 19. bxc4 b3 20. Nac3 Rxc4 21. Qe3 Rb4 22. Nd2 Nxa4 23. Nxa4 Rxa4 24. Qxb3 Nb6 25. Bc3 Bb4 26.Ra1 Rxa1 27. Rxa1 Nd5 28. Bxb4 axb4 29. Ne4 Qb6 30. Nc5 h6 31. h3 Nc3 32.Kh2 Rd8 33. Ra6 Qb5 34. Nxe6 fxe6 35. Qxe6+ Kh8 36. Rb6 Qd3 37. Qf7 Rg8 38.Rxb4 Ne2 39. Qa2 Qc3 40. Qb1 Qd2 41. Rb8 Qf4+ 42. Kh1 Nxd4 43. Rxg8+ Kxg8 44. Qa2+ Kh7 45. Qb1+ Qf5 46. Qxf5+ Nxf5> click for larger view <47. f4 h5 48. Kg1 h4 49.Kf2 Kg6 50. Kf3 Nh6 51. Ke4 Ng8 52. f5+ Kg5 53. f6 gxf6 54. exf6 Nxf6+ 55. Ke3 Kf5 56. Kf3 Ne4 57. Ke3 Ng5 0-1>

Mar-02-11		blue wave: <cro777> Well....I left the engine running for the position after <30...Rc5>. At deeper ply the eval has changed a lot. hiarcs13.1 Depth : 25/9 Time : 03:24:58 Nodes : 8685179K N/sec : 706176 Score : +0.77 31. d6 a3 32. Nxa3 Rxc1 33. Rxc1 bxa3 34. Bxa3 f5 35. Rd1 Kf7 36. Kg1 Ra8 37. Bb4 Nf6 38. Bc3 Score : +0.62 31. Rfd1 Ra8 32. d6 a3 33. Bd4 Rc6 34. Nd2 Rxd6 35. Nb3 Nf8 36. Be5 Rxd1 37. Rxd1 Ne6 38. Kg1 Rc8 39. Rd7 Rc4 40. Ra7 g5 41. Kf1 Nc5 42. Nxc5 Rxc5 43. Bd6 Rb5 44. Ra4 b3 Score : +0.45 31. Kg1 Rxd5 32. Ba1 f5 33. Rb1 b3 34. Bb2 Re4 35. Rfc1 Rc5 36. Rd1 Rexc4 37. Rxd7 Rc7 38. Rd6 Kh7 39. Rd8 Kh6 40. Ra8 Rg4 41. Rc1 Rxc1 42. Bxc1 g5 43. Ba3 Rc4 44. Rb8 Kg6 45. Kf1 Kf6 46. Bb2 Score : +0.35 31. Nd6 Rxc1 32. Rxc1 Ra8 33. Ba1 b3 34. Rb1 Nb6 35. Kg1 Nxd5 36. Kf2 Rb8 37. Nc4 Rb4 38. Na3 Rf4 39. Ke2

Mar-02-11		cro777: <blue wave: <cro777> Well....I left the engine running for the position after <30...Rc5>. At deeper ply the eval has changed a lot.> I was looking at the line: 31.Nd6 Rxc1 32.Rxc1 Ra8 33.Nc4 a3 34.Ra1 Nb6 35.Nxa3 bxa3 36.Rxa3 Rxa3 Bxa3 Nxd5 After 33.Ba1 a3 Also, after 31.d6 Rec8 I'll analyse the other lines.

Mar-02-11		blue wave: You know I followed the top line through to this 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5 8. axb5 Bxc3 9. Bxc3 cxb5 10. b3 Bb7 11. bxc4 b4 12. Bb2 Nf6 13. Bd3 Nbd7 14. O-O O-O 15. Nd2 e5 16. d5 Qe7 17. Kh1 Nc5 18. Bc2 Rfe8 19. f4 exf4 20. exf4 Qe2 21. Bd4 Nfd7 22. Qc1 a4 23. Bf5 g6 24. Bxd7 Nxd7 25. f5 Rac8 26. fxg6 hxg6 27. Qb2 Ba6 28. Rac1 Bxc4 29. Nxc4 Qxb2 30. Bxb2 Rc5 31. d6 a3 32. Nxa3 Rxc1 33. Rxc1 bxa3 34. Bxa3 f5 click for larger view hiarcs13.1 Depth : 25/1 Time : 00:38:33 Nodes : 1953543K N/sec : 844288 Score : +0.50 35. h4 Kf7 36. Rd1 Ra8 37. Bc1 Ke6 38. Bf4 Nc5 39. Kh2 Ne4 40. Rd3 Kd7 41. Rb3 Kc6 Score : +0.50 35. Rd1 Kf7 36. h4 Ra8 37. Bc1 Ke6 38. Bf4 Nc5 39. Kh2 Ne4 40. Kg1 Rh8 41. Rd3 Rd8 42. Kh2 Rh8 43. Kg1 Score : +0.50 35. h3 Kf7 36. Rc3 Re2 37. Rc8 Rd2 Score : +0.50 35. Kg1 Kf7 36. Rc3 Ke6 37. Re3 Ne5 38. Bb4 Kd5 39. Re1 Rd8 40. h4 Nc4 41. Rc1 Nxd6 42. Rd1 Kc6 43. Rxd6 Evals dropping a bit. Strange it gives 4 evals of all exaclty 0.5

Mar-02-11		cro777: <blue wave> After 31.d6 the principled move is 31...Rec8. It is correlated with 30...Rc5.

Mar-02-11		blue wave: <cro777> Looking at <31.d6 Rec8> now.

Mar-03-11		blue wave: <cro777> More study of Bern-Vukcevic 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5 8. axb5 Bxc3 9. Bxc3 cxb5 10. b3 Bb7 11. bxc4 b4 12. Bb2 Nf6 13. Bd3 Nbd7 14. O-O O-O 15. Nd2 e5 16. d5 Qe7 17. Kh1 Nc5 18. Bc2 Rfe8 19. f4 exf4 20. exf4 Qe2 21. Bd4 Nfd7 22. Qc1 a4 23. Bf5 g6 24. Bxd7 Nxd7 25. f5 Rac8 <26. fxg6 hxg6 27. Qb2 Ba6 28. Rac1 Bxc4 29. Nxc4 Qxb2 30. Bxb2 Rc5 31. d6 Rec8 32. Rfe1 *> click for larger view hiarcs13.1 Depth : 25/1 Time : 01:10:25 Nodes : 2696508K N/sec : 638189 Score : +0.79 32... g5 33. Ne3 a3 34. Rxc5 Rxc5 35. Bd4 Ra5 36. h3 b3 37. Nc4 Rd5 Score : +1.22 32... f6 33. Kg1 Kf8 34. Ne3 a3 35. Rxc5 Rxc5 36. Bd4 Ra5 37. Kf2 b3 38. Ke2 Ne5 39. Kd2 a2 40. Ba1 Rc5 41. Rf1 Kf7 42. Rf4 Score : +1.24 32... Kf8 33. Ne5 Nxe5 34. Rxc5 Rxc5 35. Bxe5 Rd5 36. Bf6 a3 37. Be7 Ke8 38. d7 Kxd7 39. Bxb4 a2 40. Bc3 Rb5 41. Kg1 Rb1 Score : +1.52 32... a3 33. Nxa3 Rxc1 34. Bxc1 bxa3 35. Bxa3 f6 36. g4 Ne5 37. g5 Ra8 38. Re3 Rd8 39. Re4 Nf7 40. gxf6 Nxd6 41. Re7 Nf7 42. Bc5 Looks like black is applying some pressure, but white seems to be holding.

Mar-03-11		blue wave: <cro777> Bern - Vukcevic 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5 8. axb5 Bxc3 9. Bxc3 cxb5 10. b3 Bb7 11. bxc4 b4 12. Bb2 Nf6 13. Bd3 Nbd7 14. O-O O-O 15. Nd2 e5 16. d5 Qe7 17. Kh1 Nc5 18. Bc2 Rfe8 19. f4 exf4 20. exf4 Qe2 21. Bd4 Nfd7 22. Qc1 a4 23. Bf5 g6 24. Bxd7 Nxd7 25. f5 Rac8 <26. fxg6 hxg6 27. Qb2 Ba6 28. Rac1 Bxc4 29. Nxc4 Qxb2 30. Bxb2 Rc5 31. d6 Rec8 32. Rfe1 g5 33. Ne3 a3 34. Rxc5 Rxc5 35. Bd4 Ra5 *> click for larger view hiarcs13.1 Depth : 24/1 Time : 02:18:13 Nodes : 5324475K N/sec : 642001 Score : +0.57 36. Nc4 Rd5 37. Ba1 Rc5 38. Re4 b3 39. h4 Rc6 40. Rd4 gxh4 41. Kh2 Ra6 42. Rd3 Ra4 43. Rxb3 Rxc4 44. Rxa3 Rc6 45. g3 Rxd6 46. gxh4 Kh7 47. Kg3 Kg6 48. Ra5 Rd3 49. Kf4 Score : +0.52 36. Rb1 a2 37. Rd1 b3 38. g4 f6 39. Ba1 Kf7 40. Kg2 Ra8 41. Kg3 Re8 42. Nc4 Re2 43. Nd2 Ke6 44. Bd4 Nc5 45. Nc4 Ne4 46. Kf3 Rc2 47. d7 Score : +0.51 36. h4 b3 37. Nc4 Rd5 38. Re8 Kh7 39. Rh8 Kg6 40. h5 Kf5 41. Bg7 f6 42. Nxa3 b2 43. Re8 Score : +0.13 36. Kg1 b3 White is struggling to restrain blacks pawns and the evals are dropping slowly. White maintains a small edge?

Mar-03-11		cro777: <blue wave: <cro777> Bern � Vukcevic 26. fxg6 hxg6 27. Qb2 Ba6 28. Rac1 Bxc4 29. Nxc4 Qxb2 30. Bxb2 Rc5 31. d6 Rec8 32. Rfe1 g5 33. Ne3 a3 34. Rxc5 Rxc5 35. Bd4 Ra5 Score : +0.57 36. Nc4 Rd5 37. Ba1 Rc5 38. Re4 b3 39. h4 Rc6 40. Rd4 gxh4 41. Kh2 Ra6 42. Rd3 Ra4 43. Rxb3 Rxc4 44. Rxa3 Rc6 45. g3 Rxd6 46. gxh4 Kh7 47. Kg3 Kg6 48. Ra5 Rd3 49. Kf4 White is struggling to restrain blacks pawns and the evals are dropping slowly. White maintains a small edge?> In the principal variation after <38.Re4> Black may play more energetically <38�f5> maintaining balance. click for larger view 39.Re8+ Kf7 40.Re7+ Kg6 41.Rg7+ Kh6 42.Rxd7 Rxc4 43.Rc7 Re4 Bg7+ Kg6 = It�s been very useful to see how computers behave in highly unbalanced positions with a positional sacrifice.

Mar-03-11		karpkasp: <cro777 & others> After 1. d4 d5 2. c4 c6 3. Nc3 e6 4. Nf3 dxc4!? I'm running an infinite analysis (I'm using Houdini 1.5 without opening book). After 35 min. of thinking (25 ply) Houdini opts for 5. e4!? and gives 5... b5 6. Be2 Nf6 7. 0-0 Be7 8. a4 0.15 The latter move is to my knowledge a theoretical novelty. It's not mentioned in the chesslab database. http://www.chesslab.com/PositionSea... But after 36 min of thinking, Houdini changes his mind and votes for 5. a4 and proposes then 5... c5!? 0.24 A rarity played in 3 games since 1991 according to the same database. I wonder if the output of the computers is valuable so early in the opening. Nonetheless, I think it's an interesting way to learn something about the opening.

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