Author: Uri Blass
Date: 04:01:40 04/16/02
Go up one level in this thread
On April 16, 2002 at 06:33:35, Uri Blass wrote: >On April 16, 2002 at 06:24:42, Uri Blass wrote: > >>On April 16, 2002 at 05:49:13, Ed Schröder wrote: >> >>>On April 15, 2002 at 17:46:55, Roy Eassa wrote: >>> >>>>[Event "Internet match"] >>>>[Site "?"] >>>>[Date "2002.04.15"] >>>>[Round "?"] >>>>[White "Hiarcs 8"] >>>>[Black "Ilya Smirin"] >>>>[Result "1/2-1/2"] >>>>[ECO "E92"] >>>>[BlackElo "2702"] >>>>[PlyCount "79"] >>>> >>>>1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. dxe5 dxe5 8. >>>>Qxd8 Rxd8 9. Bg5 Re8 10. Nd5 Nxd5 11. cxd5 c6 12. Bc4 b5 13. Bb3 a5 14. a4 Bd7 >>>>15. Nd2 bxa4 16. Bxa4 cxd5 17. exd5 Bxa4 18. Rxa4 Nd7 19. Be3 Bf8 20. Nc4 Bb4+ >>>>21. Ke2 Rec8 22. b3 Rab8 23. Nxa5 Bxa5 24. Rxa5 Rxb3 25. Rd1 Kf8 26. d6 Rb7 27. >>>>Rc1 Rxc1 28. Ra8+ Rb8 29. Rxb8+ Nxb8 30. Bxc1 Ke8 31. Kd3 Kd7 32. Ba3 f5 33. g3 >>>>g5 34. h3 h5 35. Kc4 Kc6 36. Kd3 Nd7 37. f3 Nf6 38. g4 fxg4 39. fxg4 hxg4 40. >>>>hxg4 1/2-1/2 >>>> >>>> >>>>Position after 38.g4: >>>> >>>>[d] 8/8/2kP1n2/4pppp/6P1/B2K1P1P/8/8 b - - 0 38 >>>> >>>>Can somebody confirm (or disprove) that this simple line would have won fairly >>>>easily for Black? : >>>> >>>>38...hxg4 39.hxg4 (forced) f4+ 40.Kd3 (forced) Kd7 >>>> >>>>Looks like a win for Black, but a stronger player's opinion is requested. >>> >>> >>>Rebel (giving it 30-60 secs average) came up with this line... >>> >>>1... hxg4 2. hxg4 f4 3. Ke2 Kd7 4. Bb4 Ne8 5. Bc3 Kxd6 6. Bb4+ Ke6 7. Ba5 Nd6 8. >>>Bd8 Nf7 9. Ba5 Kd5 10. Kd3 Nd6 11. Bd8 Nb5 12. Ke2 Nd4+ 13. Kf2 Ne6 14. Bb6 Kc4 >>>15. Ba5 Kc5 16. Bc3 Nd4 17. Ba5 Nc6 18. Bc3 Kc4 19. Ba1 Kb3 20. Ke2 Kc2 21. Kf2 >>>Kd2 22. Bb2 Nb4 23. Ba3 Nd3+ 24. Kf1 Ke3 25. Be7 Kxf3 26. Bxg5 e4 0-1 >>> >>>I am not sure if white has an escape after all, but it seems to be the classical >>>struggle the knight being superior to the bishop. >>> >>>Ed >> >>yace says that 3.Ke2 is losing 0.01 pawns and I suspect that these 0.01 pawns >>may be decisive for the result of the game. >> >>New position >>8/8/2kP1n2/4p1p1/5pP1/B2K1P2/8/8 w - - 0 1 >> >>Analysis by Yace 0.99.56: >> >>3.Ke2 Ne8 4.Bb2 Kxd6 5.Ba3+ Ke6 6.Bf8 Nd6 7.Bh6 Nf7 8.Bg7 Kd5 9.Kd3 Nd6 10.Ke2 >>e4 11.Bf6 Nf7 12.Kf2 exf3 13.Bh8 >> µ (-1.18) Depth: 19 00:04:52 76538kN >>3.Bb4 e4+ 4.fxe4 Nxg4 5.e5 Nxe5+ 6.Ke4 Nc4 7.Bc3 Nxd6+ 8.Kf3 Nc4 9.Ke4 Kd7 >>10.Bf6 Nd2+ 11.Kd3 Nf3 >> µ (-1.17) Depth: 19 00:08:00 149829kN >>3.Bb4 e4+ 4.fxe4 Nxg4 5.e5 Nxe5+ 6.Ke4 Nc4 7.Bc3 Nxd6+ 8.Kf3 Nc4 9.Ke4 >> µ (-1.17) Depth: 19 00:08:45 167224kN >> >>(Blass, Tel-aviv 16.04.2002) >> >>Uri > >The score for 3.Bb4 goes down at depth 20 >I expect the score to stop going down if the position is a real draw. > >Inspite of the fact that the score for 3.Bb4 goes down yace does not find a >better alternative at depth 20. > >[D]8/8/2kP1n2/4p1p1/5pP1/B2K1P2/8/8 w - - 0 1 > >Analysis by Yace 0.99.56: > > 3.Bb4 e4+ 4.fxe4 Nxg4 5.e5 Nxe5+ 6.Ke4 Nc4 7.Bc3 Nxd6+ 8.Kf3 Nc4 9.Ke4 Kd7 >10.Bf6 Nd2+ 11.Kd3 Nf3 12.Ke4 Ne1 13.Bxg5 f3 14.Ke3 > µ (-1.21) Depth: 20 00:16:50 325381kN > >(Blass, Tel-aviv 16.04.2002) > >Uri The main line of yace clearly leads to a draw and it seems that 3...e4+ is bad. Here is the analysis after 8.Kf3 New position 8/8/2kn4/6p1/5p2/2B2K2/8/8 b - - 0 1 Analysis by Yace 0.99.56: 8...Nc4 9.Ke4 Kd6 10.Bf6 Nd2+ 11.Kd3 g4 12.Kxd2 Ke6 13.Bc3 Kf5 14.Ke2 Ke4 15.Kf2 Kd3 16.Be5 f3 17.Kg3 Kc4 18.Bf4 Kb4 19.Be3 f2 20.Bxf2 Kb3 21.Kxg4 = (-0.11) Depth: 19 00:01:48 43297kN (Blass, Tel-aviv 16.04.2002) After some learning I can get also score of almost draw before 6.Ke4 and before 5.e5 If black has a win it is clearly not by 3...e4+ because after e4+ black has nothing better than 4...Nxg4+ that is enough only for a draw. New position 8/8/2kP4/4n1p1/1B3p2/3K4/8/8 w - - 0 1 Analysis by Yace 0.99.56: 6.Ke4 Nc4 7.Bc3 Kxd6 8.Bf6 Nd2+ 9.Kd3 g4 10.Kxd2 Ke6 11.Bh4 Kf5 12.Ke2 Ke4 13.Kf2 Kd3 14.Bg5 f3 15.Be3 Kc2 16.Kg3 Kd3 17.Bb6 Kc3 = (-0.12) Depth: 16 00:00:02 754kN (Blass, Tel-aviv 16.04.2002) New position 8/8/2kP4/6p1/1B2Ppn1/3K4/8/8 w - - 0 1 Analysis by Yace 0.99.56: 5.e5 Kd5 6.Bc3 Nh6 7.d7 Nf7 8.e6 Kxe6 9.Ke4 f3 10.Kxf3 g4+ 11.Kg3 Kxd7 12.Kxg4 = (-0.20) Depth: 17 00:00:22 5301kN (Blass, Tel-aviv 16.04.2002) New position 8/8/2kP1n2/6p1/1B2PpP1/3K4/8/8 b - - 0 1 Analysis by Yace 0.99.56: 4...Nxg4 5.e5 Kd5 6.Bc3 Nh6 7.d7 Nf7 8.e6 Kxe6 9.Ke4 f3 10.Kxf3 g4+ 11.Kg3 Kxd7 12.Kxg4 = (-0.20) Depth: 17 00:00:37 13677kN (Blass, Tel-aviv 16.04.2002) New position [D]8/8/2kP1n2/4p1p1/1B3pP1/3K1P2/8/8 b - - 0 1 Analysis by Yace 0.99.56: 3...Nxg4 4.fxg4 +- (2.12) Depth: 1 00:00:00 3...Nh7 ± (0.76) Depth: 1 00:00:00 3...Nd5 ² (0.55) Depth: 1 00:00:00 3...Nd7 ² (0.47) Depth: 1 00:00:00 3...e4+ 4.fxe4 Nxg4 5.e5 Kd5 6.Bc3 Nh6 7.d7 Nf7 8.e6 Kxe6 9.Ke4 f3 10.Kxf3 g4+ 11.Kg3 Kxd7 12.Kxg4 = (-0.20) Depth: 1 00:00:00 3...e4+ 4.fxe4 Nxg4 5.e5 Kd5 6.Bc3 Nh6 7.d7 Nf7 8.e6 Kxe6 9.Ke4 f3 10.Kxf3 g4+ 11.Kg3 Kxd7 12.Kxg4 = (-0.20) Depth: 2 00:00:00 3...e4+ 4.fxe4 Nxg4 5.e5 Kd5 6.Bc3 Nh6 7.d7 Nf7 8.e6 Kxe6 9.Ke4 f3 10.Kxf3 g4+ 11.Kg3 Kxd7 12.Kxg4 = (-0.20) Depth: 3 00:00:00 3...e4+ 4.fxe4 Nxg4 5.e5 Kd5 6.Bc3 Nh6 7.d7 Nf7 8.e6 Kxe6 9.Ke4 f3 10.Kxf3 g4+ 11.Kg3 Kxd7 12.Kxg4 = (-0.20) Depth: 4 00:00:00 3...e4+ 4.fxe4 Nxg4 5.e5 Kd5 6.Bc3 Nh6 7.d7 Nf7 8.e6 Kxe6 9.Ke4 f3 10.Kxf3 g4+ 11.Kg3 Kxd7 12.Kxg4 = (-0.20) Depth: 5 00:00:00 3...e4+ 4.fxe4 Nxg4 5.e5 Kd5 6.Bc3 Nh6 7.d7 Nf7 8.e6 Kxe6 9.Ke4 f3 10.Kxf3 g4+ 11.Kg3 Kxd7 12.Kxg4 = (-0.20) Depth: 6 00:00:00 1kN 3...e4+ 4.fxe4 Nxg4 5.e5 Kd5 6.Bc3 Nh6 7.d7 Nf7 8.e6 Kxe6 9.Ke4 f3 10.Kxf3 g4+ 11.Kg3 Kxd7 12.Kxg4 = (-0.20) Depth: 7 00:00:00 3kN 3...Kd7 4.Ba3 e4+ 5.Ke2 Ne8 6.Bc5 exf3+ 7.Kxf3 Nxd6 8.Ba3 Ke6 9.Bc1 Ke5 10.Bd2 Nf7 11.Bc3+ Ke6 12.Bd2 Ne5+ 13.Ke4 Nxg4 14.Kf3 Nf6 15.Bc3 = (-0.21) Depth: 7 00:00:00 3kN 3...Kd7 4.Bc5 Ne8 5.Kc4 Nxd6+ 6.Kd5 Nf7 ³ (-0.55) Depth: 7 00:00:00 3kN 3...Kd7 4.Bc5 Ne8 5.Kc4 Nxd6+ 6.Kd5 Nf7 7.Ke4 ³ (-0.52) Depth: 8 00:00:00 17kN 3...Kd7 4.Bc5 Ne8 5.Kc4 Nxd6+ 6.Kd5 Nf7 7.Bb4 Kd8 ³ (-0.51) Depth: 9 00:00:00 42kN 3...Kd7 4.Bc5 Ke6 5.Bb4 Ne8 6.Ba5 Nxd6 7.Bd8 Nf7 8.Bc7 ³ (-0.68) Depth: 10 00:00:00 125kN 3...Kd7 4.Ke2 Ne8 5.Kd3 Nxd6 6.Ba5 Ke6 7.Bd8 Nf7 8.Ba5 Kd5 µ (-0.76) Depth: 11 00:00:00 421kN 3...Kd7 4.Ba5 Kxd6 5.Bd8 Nh7 6.Ke4 Ke6 µ (-0.72) Depth: 12 00:00:01 576kN 3...Kd7 4.Ke2 e4 5.Bc3 Ke6 6.Ba5 exf3+ 7.Kxf3 Kxd6 8.Bd8 Ke6 9.Ba5 Kd7 10.Bb4 Nd5 11.Bf8 Ke6 12.Bg7 µ (-1.11) Depth: 13 00:00:03 1658kN 3...Kd7 4.Ke2 e4 5.Bc3 Ke6 6.Kf2 e3+ 7.Ke2 Ne8 8.Ba5 Nxd6 9.Bd8 Nf7 10.Bc7 µ (-1.10) Depth: 14 00:00:05 2715kN 3...Kd7 4.Ke2 e4 5.Bc3 Ke6 6.Ba5 exf3+ 7.Kxf3 Kxd6 8.Bb4+ Kd7 9.Bf8 Ng8 10.Bg7 Ke6 11.Bb2 µ (-0.93) Depth: 15 00:00:10 4917kN 3...Kd7 4.Ke2 e4 5.Bc3 Ke6 6.Ba5 exf3+ 7.Kxf3 Kxd6 8.Bd8 Ke6 9.Bc7 Nd5 10.Bd8 Ne7 11.Bc7 Ng6 12.Ba5 µ (-1.03) Depth: 16 00:00:19 8769kN 3...Kd7 4.Ke2 Ne8 5.Bc3 Kxd6 6.Bb4+ Ke6 7.Bf8 e4 8.Bh6 exf3+ 9.Kxf3 Kf6 10.Bf8 Nc7 µ (-1.09) Depth: 17 00:00:40 17982kN 3...Kd7 4.Ke2 Ne8 5.Bc3 Kxd6 6.Bb4+ Ke6 7.Bf8 e4 8.Bh6 exf3+ 9.Kxf3 Kf6 10.Bf8 Nc7 11.Ke4 Ne6 12.Bd6 Kf7 13.Be5 µ (-1.11) Depth: 18 00:01:15 31662kN 3...Kd7 4.Ke2 Ne8 5.Bc3 Kxd6 6.Bb4+ Ke6 7.Bf8 Nd6 8.Bh6 Nf7 9.Bg7 Kd5 10.Kd3 Nd6 11.Bh6 e4+ 12.Ke2 µ (-1.12) Depth: 19 00:02:51 63488kN (Blass, Tel-aviv 16.04.2002) Uri
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