Author: Martin Giepmans
Date: 07:40:11 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
>
>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
SpiderChess thinks it's a draw:
05 0:00:00 + 0.03 C5xA4 E3-B3 A4-C5 B3xB6 C5-D3
0:00:00 + 0.09 F8-E8 E3-A3 E8-E7 A3-C3
06 0:00:00 0.00 F8-E8 E3-A3 E8-F8 A3-E3
0:00:00 + 0.27 C5xA4 E3-B3 D1-C1 C4-B5 C1-A1
07 0:00:00 + 0.16 C5xA4 E3-B3 D1-C1 C4-A6 H1-D1 F3-E5
08 0:00:01 + 0.15 C5xA4 C4-C8 F8-G7 C8-C4 A4-C5 C4-B5 D1-B1 B5-E8
0:00:01 + 0.18 F7-F6 H3-H4 F8-E7 E3-A3 E7-F7 C4-B5 D1-B1
09 0:00:02 + 0.02 F7-F6 C4-E2 D1xE2 E3xE2 H1-D1 E2-A2 F8-E7 H3-H4
10 0:00:06 0.00 F7-F6 F3-D4 E6-E5 D4-E6 C5xE6 C4xE6 H1-G1 G2-H2 G1-H1 H2-G2
11 0:00:18 0.00 F7-F6 F3-D4 E6-E5 D4-E6 C5xE6 C4xE6 H1-G1 G2-H2 G1-H1 H2-G2
12 0:00:43 0.00 F7-F6 F3-D4 E6-E5 D4-E6 C5xE6 C4xE6 H1-G1 G2-H2 G1-H1 H2-G2
13 0:01:58 0.00 F7-F6 F3-D4 E6-E5 D4-E6 C5xE6 C4xE6 H1-G1 G2-H2 G1-H1 H2-G2
14 0:05:56 0.00 F7-F6 F3-D4 E6-E5 D4-E6 C5xE6 C4xE6 H1-G1 G2-H2 G1-H1 H2-G2
I think 41 .. Rh2 was the losing move;
SpiderChess wants to play 41 ... Nc5 and gives a draw score.
Martin
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