Author: Matthew White
Date: 15:03:46 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
Rebel 12 Beta 1 (VMWare on a 2x2.4Ghz P4 Xeon With HT enabled, but processor
affinity for VMWare set to 1,2)
Thinking....
+---+---+---+---+---+---+---+---+ End 1 - Pos 1
8 | | | | | | *K| | |
+---+---+---+---+---+---+---+---+ 00:00:00 00:00:00
7 | | | | | | *p| | |
+---+---+---+---+---+---+---+---+
6 | | *p| | | *p| | | | Time fixed:
+---+---+---+---+---+---+---+---+ Hash 4 Mb
5 | *p| | *N| | | | | | Engine Beta 1
+---+---+---+---+---+---+---+---+ Personality beta1.eng
4 | p | | Q | | | | | | anti-GM Off
+---+---+---+---+---+---+---+---+ Tactics Off
3 | | | | | R | N | p | p | Bluff Chess Off
+---+---+---+---+---+---+---+---+ Style Normal
2 | | | | | | p | K | | Strength Strongest
+---+---+---+---+---+---+---+---+ Search Nullmove
1 | | | | *Q| | | | *R|
+---+---+---+---+---+---+---+---+
a b c d e f g h
5k2/5p2/1p2p3/p1n5/P1Q5/4RNPP/5PK1/3q3r b - -
[Event "?"]
[Site "?"]
[Date "??.??.????"]
[Round "?"]
[White "Pos 1"]
[Black "End 1"]
[Result "*"]
[WhiteElo "?"]
[BlackElo "?"]
[FEN "5k2/5p2/1p2p3/p1n5/P1Q5/4RNPP/5PK1/3q3r b - - 0 1"]
1..*
00:00:00 1.00 -1.71 1..Nd3 2.Rxd3
00:00:00 1.02 2.38 1..Nxa4
00:00:00 2.00 1.77 1..Nxa4 2.Qc8+ Kg7
00:00:00 2.06 1.83 1..f5 2.Qb5 Nxa4 3.Rxe6
00:00:00 2.21 1.84 1..Qa1 2.Qb5 Nxa4
00:00:00 3.00 1.21 1..Qa1 2.Qb5 f5 3.Nh4 Qd1
00:00:00 3.01 1.21 1..f5
00:00:00 3.01 1.95 1..f5 2.Ra3 Kg8
00:00:00 4.00 0.41 1..f5 2.Qe2 Qc1 3.Ne1 Nxa4 4.Kxh1 Qc6
5.Nf3 (0)
00:00:00 4.01 1.45 1..Qa1 2.Qb5 f5 3.Qc4
00:00:00 5.00 1.37 1..Qa1 2.Re5 f5 3.Rxc5 bxc5 4.Qxc5 Kf7
5.Qa7 (0)
00:00:00 6.00 0.68 1..Qa1 2.Qe2 Nxa4 3.Ra3 Qxa3 4.Kxh1
Qc1 5.Qe1 (0)
00:00:01 6.09 1.47 1..Qb1 2.Qe2 Nxa4 3.Ne1 Nc3 4.Qd2 Qa2
5.Qxc3 b5 (1)
00:00:01 7.00 0.31 1..Qb1 2.Qe2 Rd1 3.Qb5 Qf5 4.Kh2 Rc1
00:00:01 7.01 0.68 1..Qa1 2.Qe2 Nxa4 3.Ra3 Qxa3 4.Kxh1
Qc1 5.Qe1 (1)
00:00:01 8.00 0.47 1..Qa1 2.Qe2 Rb1 3.Qd2 Rd1
00:00:02 8.06 0.47 1..Nxa4
00:00:02 8.06 0.85 1..Nxa4 2.Ne1 Rxe1 3.Rxe1 Qxe1 4.Qxa4
Qb4 5.Qc2 b5 (2)
00:00:03 9.00 0.78 1..Nxa4 2.Qd3
00:00:07 10.00 0.52 1..Nxa4 2.Re4 Nc5 3.Rd4 Qb1 4.Rd8 Ke7
5.Rh8 (5)
00:00:24 11.00 0.00 1..Nxa4 2.Qc8+ Kg7 3.Ng5 Rg1
00:00:27 11.01 0.11 1..Qa1 2.Qe2 Rb1 3.Qd2 Qf6
00:00:28 11.03 0.16 1..Qb1 2.Qe2 Rc1 3.Qb5 Rd1 4.Qxb1
00:00:44 11.09 0.31 1..Ke7 2.Qe2 Qxe2 3.Rxe2 Rc1 4.Ra2
00:01:39 12.00 0.31 1..Ke7 2.Qe2 Qxe2 3.Rxe2 Ra1
00:06:36 13.00 0.00 1..Ke7 2.Re5
00:07:42 13.01 0.20 1..Qb1 2.Qe2
00:21:11 14.00 0.18 1..Qb1 2.Qe2 Rd1 3.Qc4
00:59:04 15.00 0.11 1..Qb1 2.Qe2 Rc1
Positions : 1.778.741.041
Nodes per second : 494.094
Extensions (checks) : 0 (0%)
Extensions (captures) : 0 (0%)
Extensions (king safety) : 0 (0%)
Extensions (on depth) : 0 (0%)
Extensions (remaining) : 0 (0%)
Extensions (total) : 0 (0%)
Hash Table : 27.249.638 27.161.056 (100%)
Average depth : 19
Deepest depth : 60
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.