Author: Joachim Rang
Date: 01:48:24 09/17/02
Go up one level in this thread
On September 17, 2002 at 04:25:01, Uri Blass wrote:
>On September 17, 2002 at 03:55:12, Uri Blass wrote:
>
>>Here is the relevant game with comments from previous post of nemethposted by
>>Nemeth.
>>
>>I do not think that finding Re8 is a good test position because it probably
>>leads to a draw like the game move.
>>
>>
>>[Event "3/95-39 WDR Köln"]
>>[Site "?"]
>>[Date "1995.??.??"]
>>[Round "?"]
>>[White "Kasparov,G"]
>>[Black "Pentium Genius"]
>>[ECO "D15"]
>>[Result "1-0"]
>>
>>1. c4 c6 2. d4 d5 3. Nf3 Nf6 4. Nc3 a6 5. c5 g6 6. Bf4 Bg7
>>7. h3 O-O 8. e3 Nbd7 9. Bd3 Ne8 (9... Re8 $6 10. Bh2 Nh5
>>11. g4 Nhf6 12. Rc1 {verhindert e5 (Kasparov-Kudrin, Tel
>>Aviv Simultan 1994)}) 10. Rc1 (10. O-O Nc7 11. Bg3 Re8
>>12. Bh4 Bf6 13. Bxf6 exf6 14. e4 Nf8 15. Re1 Be6 16. Qd2
>>Qd7 17. exd5 Bxd5 {van Wely-Paunovic, Hania 1993}) 10... f6
>>11. e4 e5 12. dxe5 Nxc5 13. exd5 fxe5 14. Be3 (14. Bxe5
>>Bxe5 15. Nxe5 Qg5 $19) 14... Nxd3+ 15. Qxd3 e4 16. Qxe4
>>(16. Nxe4 Bf5 17. d6 Qa5+ 18. Nfd2 Qxa2 {unklar}) 16... Nf6
>>17. Qc4 Nxd5 18. Nxd5 (18. O-O Bxh3 $5 19. Ng5 Bf5 20. Rfd1
>>Bxc3 21. Rxc3 h6 22. Nf3 Kh7 {unklar}) 18... Be6 19. O-O
>>Bxd5 20. Qg4 Bxf3 21. gxf3 Qd5 {_} 22. Rcd1 Qxa2 $2
>>(22... Qxf3) (22... Qxf3) 23. Rd7 Rf7 (23... Qb3 $5 24. Bd4
>>Bxd4 25. Qxd4 Rf7) (23... Qxb2 24. Qc4+ Kh8 25. Rxg7
>>(25. Qh4 g5) 25... Qxg7 26. Bd4 Rf6 27. Qc3 Raf8 28. Re1
>>Qf7) 24. Rfd1 Qb3 $2 (24... Qxb2 $4 25. Rxf7 Kxf7 26. Qc4+
>>{nebst Matt}) (24... Re8 {hält die Stellung. Genius spielt
>>diesen Zug nach 8,5 min} 25. Rxf7 Qxf7 26. Rd7 h5 $1
>>27. Rxf7 hxg4 28. Rxb7 gxf3 {und Weiß hat noch Probleme.})
>>25. R1d3 Qxb2 {_} (25... Qa2 26. b3 Rxd7 27. Qxd7 Rf8
>>28. Qe6+ Kh8 29. Rd7 {und Weiß steht etwas besser})
>>26. Qc4 $3 (26. Rxf7 Qb1+ 27. Kg2 Qxd3 28. Rxb7 {Mit
>>Vorteil für Schwarz}) 26... Raf8 (26... Qf6 27. Rxb7 Raf8
>>28. Rdd7 Qxf3 29. Bc5 h6 {und Weiß braucht einen
>>Gewinnplan}) 27. Rxf7 Rxf7 28. Rd8+ Bf8 29. Bh6 Qa3 {_}
>>30. Qe6 $1 Qc5 31. h4 Qb4 32. f4 Qb1+ 33. Kh2 Qb4
>>34. Kg2 $1 (34. f5 $4 Qxh4+) 34... Qa3 35. h5 gxh5 36. f5
>>Qb4 37. Rxf8+ Qxf8 38. Bxf8 Kxf8 39. f6 Rxf6 (39... Kg8
>>40. Kg3 c5 41. Kh4 c4 42. Kxh5 c3 43. Qg4+ Kh8 44. Qc8+ Rf8
>>45. Qxf8#) 1-0
>>
>>I gave programs long time to analyze and I do not agree with the analysis for
>>24...Re8
>>
>>It seems that after 24...Re8 the right move for white is not 25.Rxf7 but 25.Rd8
>>
>>possible lines are:
>>
>>25...Rff8 26.Rxe8 Rxe8 27.Rd7
>>
>>and now a possible line is 27...Qb3 28.Qf4 Rf8 29.Qe4 with a draw(it seems that
>>29.Rxg7+ does not give an advantage for white)
>>
>>black may have different alternatives but yace can see only a minimal advantage
>>for black after long analysis
>>
>>27...b7-b5 28.Be3-d4 Bg7-h6 29.Bd4-c3 Qa2-c4 30.Qg4xc4+ b5xc4 31.Rd7-a7 c6-c5
>>32.Ra7xa6 Bh6-g7 33.Kg1-g2 Bg7xc3 34.b2xc3 Re8-f8 35.Ra6-c6 Rf8-f5 36.Rc6-c7
>> = (-0.24) Depth: 16 07:09:19 1449631kN
>>
>>Another alternative that yace can learn to play is 25...Ref8 26.Bc5 Qxb2 27.Bxf8
>>Bxf8 but after 28.R1d7 yace has to admit that black's advantage was an illusion.
>>
>>After learning it yace prefers 25...Rxd8 26.Rxd8+ Rf8 27.Rxf8+ Bxf8
>>28.Qc8 Qf7 29.Bh6 and again I believe that white is not worse.
>>
>>Uri
>
>Note that in the last line 27.Rd7 is also possible and at least old Deep Fritz
>likes that move and fails high on this move at depth 15.
>
>Yace also seems to see problems after 27.Rd7 and the score drops from Qxb2 1.73
>for black(depth 10) to Qxb2 (0.48 pawns for white) at depth 11.
>
>Later yace changes it's mind and converges to 27...b5 at the end of iteration
>11(only 0.49 pawns for black)
>
>The score drops at depth 12 and is only 0.46 pawns for black.
>
>Uri
ergo 24...Re8 leads to a draw. IIRC nobody said nothing else.
The question is, does 26... Qf6 leads to a draw too, or is after 24...Qb3 blacks
position lost.
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