Author: Uri Blass
Date: 01:25:01 09/17/02
Go up one level in this thread
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
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