Author: Ulrich Tuerke
Date: 14:33:55 05/24/03
Go up one level in this thread
On May 24, 2003 at 09:03:54, Andrew Williams wrote:
>Hi,
>
>PM lost a game against Deep Sjeng on ICC yesterday. For a long time PM
>thought it was going to win, but it underestimated DS's attack on its
>e-pawn. I think the turning point was here:
>
>[D] 5k2/5p2/1p2p3/p1n5/P1Q5/4RNPP/5PK1/3q3r b - - 0 39 am Nxa4
Comet's analysis on Athlon XP 2000:
New position
5k2/5p2/1p2p3/p1n5/P1Q5/4RNPP/5PK1/3q3r b - - 0 1
Analysis by Comet B60 (from White's view):
...
1...Nxa4 2.Re4 Nc5 3.Rd4 Qb1
(-1.36) Depth: 6/24 00:00:00 217kN
1...Nxa4 2.Ng5 Rxh3 3.Nxh3 Kg7
(-1.00) Depth: 7/27 00:00:02 1763kN
1...Nxa4 2.Ng5 Rxh3 3.Nxh3 Kg7
(-0.29) Depth: 7/31 00:00:05 3570kN
1...Qb1 2.Ra3 Ke7 3.Qb5 Qd1 4.h4 Qc1
(-0.60) Depth: 7/31 00:00:06 4232kN
1...Qa1 2.Re5 Nxa4 3.Qc8+ Ke7 4.Qc7+ Kf6 5.Qd8+ Kg7 6.Qxb6
(-1.00) Depth: 7/31 00:00:06 4730kN
1...Qa1 2.Ng5 Qg1+ 3.Kf3 Qd1+ 4.Kg2 Ke7 5.Qf4 Rg1+ 6.Kh2 Qa1
(-1.00) Depth: 8/31 00:00:09 6559kN
1...Qa1 2.Re5
(-0.70) Depth: 9/34 00:00:17 12189kN
1...Qa1 2.Re5
(-0.49) Depth: 10/35 00:00:48 35192kN
1...Qa1 2.Re5 Qc1 3.Qe2 Rd1 4.Qb5 Rd6 5.Rg5 Qa1 6.Rg4 Ke7
(-0.25) Depth: 11/38 00:02:43 128961kN
>
>PM was very happy with 39... Nxa4?, but this seems to me to "miss the point"
>of the position. PM drops it in 38 seconds if I tell it to search from here.
>
>What do your programs think about this position? Do they ever consider Nxa4?
>How do they evaluate the position? As always, I'm especially interested in
>amateur programs' analyses.
>
>PM evaluates the position above as +1.37 for Black. Technically speaking,
>it likes the attack on the White King and misunderstands the fact that
>once the e-pawn falls, White will have an overwhelming attack on the Black
>King. At the moment it (statically at least) doesn't think White is attacking
>Black's King at all, because the squares surrounding Black's King are not
>attacked - for several moves, PM had been expecting White to play Nxe6.
>
>Some very long searches from the above position suggest the line:
>1... Qa1 2. Re5 Rg1+ 3. Nxg1 Qxe5 4. Qh4 and PM is now contemplating 4...Ke8
>with a score of +0.60 for Black.
>
>The full game is interesting; it's a very impressive finish from Deep Sjeng, but
>I have the feeling that this is at least 1/2 point that "got away" from PM.
>
>
>[Event "ICS rated standard match"]
>[Site "204.178.125.65"]
>[Date "2003.05.23"]
>[Round "-"]
>[White "TombRaider"]
>[Black "PostModernist"]
>[Result "1-0"]
>[WhiteElo "2433"]
>[BlackElo "2456"]
>[TimeControl "1800+10"]
>
>1. Nf3 Nf6 2. d4 d5 3. c4 e6 4. Nc3 dxc4 5. e4 Bb4 6. Bg5 c5 7. e5 h6 8.
>exf6 hxg5 9. fxg7 Rg8 10. dxc5 Qf6 11. Rc1 Bxc5 12. Bxc4 g4 13. Bb5+ Bd7
>14. Ne4 Bb4+ 15. Nfd2 Qxg7 16. Rc8+ Ke7 17. Rxg8 Qxg8 18. Bxd7 Nxd7 19. O-O
>Qg6 20. Qb3 Bxd2 21. Qa3+ Ke8 22. Nxd2 Qc2 23. Nb3 b6 24. Qa4 Rd8 25. Qxg4
>Qxb2 26. Qa4 a5 27. h3 Ke7 28. Re1 Nf6 29. Qc4 Rd5 30. a4 Kf8 31. g3 Nd7
>32. Re3 Rd1+ 33. Kg2 Qb1 34. Nd4 Rg1+ 35. Kh2 Rh1+ 36. Kg2 Qg1+ 37. Kf3
>Qd1+ 38. Kg2 Nc5 39. Nf3 Nxa4 40. Ng5 Qg1+ 41. Kf3 Rh2 42. Nxe6+ fxe6 43.
>Qc8+ Kg7 44. Qd7+ Kf8 45. Kg4 Rxf2 46. Rxe6 Rf7
>{PostModernist resigns} 1-0
>
>Andrew
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