Chess System Tal 2.1 EAS
Moderator: Ras
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Robert Flesher
- Posts: 1285
- Joined: Tue Aug 18, 2009 3:06 am
Re: Chess System Tal 2.1 EAS
Many years ago I created settings for Zappa Mexico II. They were called "Dissident Aggressor" The idea was to change the style of play. For that, I believe I did so. But, now fast forward to today we have Chess Tal 2.1 EAS. This to me is the pinnacle of chess engine evolution when regarding the ability for the engine to play very strong chess, but choose a much different plan. Tal would be proud! Thank you Chris!
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Rowen
- Posts: 99
- Joined: Tue Nov 15, 2016 1:19 pm
- Location: Cheshire, England
Re: Chess System Tal 2.1 EAS
How do these versions of chess system Tal compare with the original versions from many years ago, style wise? I seem to vaguely recall the original CSTAl versions being even more sacrificial and unorthodox/ wild, but perhaps I am being sentimental (or forgetful) or just mistaken as they were among the first computer chess programs that I tried years ago. I am considering attempting re installing some of those original programs but if they are similar style wise ?
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chrisw
- Posts: 4622
- Joined: Tue Apr 03, 2012 4:28 pm
- Location: Midi-Pyrénées
- Full name: Christopher Whittington
Re: Chess System Tal 2.1 EAS
Difficult to answer about questions of style, I understand what the old HCE versions were doing because I engineered the sacrificial functions myself. The NN versions are a law unto themselves, one can try and influence but with more or less not too much control of why they do what they do.
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Eraserheads
- Posts: 237
- Joined: Fri Mar 10, 2006 9:19 am
- Location: Quezon City, Philippines
Re: Chess System Tal 2.1 EAS
I remember this setting, it was one of the most aggressive chess I've seen during that time. Pretty effective against humans.Robert Flesher wrote: ↑Sat Apr 26, 2025 4:52 pm Many years ago I created settings for Zappa Mexico II. They were called "Dissident Aggressor" The idea was to change the style of play. For that, I believe I did so. But, now fast forward to today we have Chess Tal 2.1 EAS. This to me is the pinnacle of chess engine evolution when regarding the ability for the engine to play very strong chess, but choose a much different plan. Tal would be proud! Thank you Chris!
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Rebel
- Posts: 7293
- Joined: Thu Aug 18, 2011 12:04 pm
- Full name: Ed Schröder
Re: Chess System Tal 2.1 EAS
Created a tool that measures king attacks from human or computer PGN's
Using data from Steven Pohl's rating list we get -
250 CSTal king attacks in PGN, comments included.
The first one -
[pgn][Event "UHO Ratinglist"]
[Site ""]
[Date "2025.03.29"]
[Round "2"]
[White "CSTal 2.1 EAS"]
[Black "Koivisto 9.2 avx2"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
1. e4 { book } 1... e6 { book } 2. d4 { book } 2... d5 { book } 3. Nc3 {
book } 3... Bb4 { book } 4. e5 { book } 4... b6 { book } 5. a3 { book }
5... Bf8 { book } 6. Nf3 { book } 6... Ne7 { book } 7. Ne2 { +1.72/22 8.3s
} 7... Ba6 { -1.55/26 9.3s } 8. h4 { +1.70/25 9.1s } 8... c5 { -1.68/25
8.4s } 9. h5 { +1.64/24 5.4s } 9... Nec6 { -1.56/26 16s } 10. c3 { +1.50/21
7.3s } 10... Be7 { -1.25/24 6.8s } 11. Rh3 { +1.97/20 4.2s } 11... O-O {
-1.24/23 3.6s } 12. Rg3 { +1.88/22 5.8s } 12... Kh8 { -1.42/23 3.5s } 13.
Nf4 { +1.83/21 8.8s } 13... Bxf1 { -0.99/22 5.4s } 14. Kxf1 { +1.64/20 6.2s
} 14... h6 { -1.15/23 9.6s } 15. Qd3 { +1.60/20 6.7s } 15... Rg8 { -0.91/21
3.8s } 16. Rg6 { +1.83/17 4.3s } 16... Qc8 { -0.82/21 4.1s } 17. Kg1 {
+1.60/17 7.3s } 17... cxd4 { -0.89/24 12s } 18. cxd4 { +2.19/18 3.7s }
18... Nd7 { -0.85/23 3.1s } 19. Rxe6 { +2.57/19 3.2s } 19... Re8 { -1.01/22
2.9s } 20. Rxh6+ { +2.19/19 3.1s } 20... gxh6 { -0.06/23 2.1s } 21. e6 {
+1.81/18 3.6s } 21... fxe6 { -0.16/26 8.3s } 22. Qg6 { +3.27/19 8.2s }
22... Bf8 { -1.30/28 13s } 23. Qf7 { +2.04/20 4.2s } 23... Bg7 { -1.34/29
7.8s } 24. Ng6+ { +5.55/19 2.7s } 24... Kh7 { -1.34/1 0.001s } 25. Bxh6 {
+5.73/21 3.2s } 25... Kxh6 { -3.57/29 5.6s } 26. Qf4+ { +5.97/21 2.8s }
26... Kh7 { -3.28/31 7.6s } 27. Ng5+ { +6.01/22 3.9s } 27... Kh6 { -2.69/29
1.5s } 28. Nf3+ { 0.00/5 0.001s } 28... Kh7 { +0.05/128 0.004s } 29. Ng5+ {
0.00/4 0.001s } 29... Kh6 { +0.07/128 0.004s } 30. Nxe6+ { +5.92/22 5.7s }
30... Kh7 { -2.79/29 2.8s } 31. Ng5+ { +6.27/25 10s } 31... Kh6 { -3.45/28
3.5s } 32. Ne6+ { 0.00/4 0.001s } 32... Kh7 { -0.03/128 0.004s } 33. Ng5+ {
0.00/4 0.001s } 33... Kh6 { -0.01/128 0.004s } 34. Nh4 { +6.46/18 3.0s }
34... Nxd4 { -3.32/29 4.9s } 35. Nf5+ { +9.46/21 2.4s } 35... Kxh5 {
-3.42/28 2.3s } 36. g4+ { +10.09/24 5.9s } 36... Kg6 { -3.42/1 0.001s } 37.
Nh4+ { +10.01/24 2.7s } 37... Kh6 { -3.18/1 0.002s } 38. Qf7 { +10.15/25
3.0s } 38... Kxg5 { -7.77/25 15s } 39. Qxg7+ { +10.74/25 3.3s } 39... Kf4 {
-9.53/25 2.8s } 40. Ng2+ { +10.80/24 2.2s } 40... Ke4 { -4.86/27 1.7s } 41.
Qg6+ { +10.81/26 2.7s } 41... Kf3 { -12.71/27 11s } 42. Qd3+ { +11.01/26
4.1s } 42... Kxg4 { -14.90/29 3.8s } 43. Qg6+ { +11.13/24 2.6s } 43... Kf3
{ -15.08/29 1.5s } 44. Qh5+ { +11.26/22 2.1s } 44... Ke4 { -15.08/1 0.001s
} 45. Re1+ { +11.27/24 2.9s } 45... Kd3 { -15.43/27 1.7s } 46. Nf4+ {
+11.39/25 3.2s } 46... Kc2 { -15.51/27 1.5s } 47. Qd1+ { +11.52/23 2.7s }
47... Kxb2 { -15.51/1 0.001s } 48. Qxd4+ { +11.65/24 2.5s } 48... Qc3 {
-15.70/26 2.9s } 49. Nd3+ { +11.58/23 2.2s } 49... Ka2 { -15.74/25 1.8s }
50. Qxc3 { +11.63/25 4.1s } 50... Rxe1+ { -16.20/25 7.0s } 51. Qxe1 {
+11.84/24 3.5s } 51... Rc8 { -15.63/23 3.0s } 52. Qd2+ { +12.10/21 2.9s }
52... Kb3 { -16.47/22 1.3s } 53. Qb2+ { +11.85/21 2.5s } 53... Kc4 {
-16.51/21 0.85s } 54. Qc2+ { +12.26/22 2.4s } 54... Kb5 { -16.64/22 4.8s }
55. Qxc8 { +14.47/18 4.1s } 55... Nc5 { -16.70/20 0.93s } 56. Nxc5 {
+14.89/17 1.7s } 56... bxc5 { -18.20/18 1.00s } 57. f4 { +16.08/17 1.4s }
57... d4 { -22.54/20 4.4s } 58. f5 { +M23/18 1.1s } 58... c4 { -27.23/20
5.2s } 59. f6 { +M13/27 1.4s } 59... d3 { -M12/26 2.3s } 60. Qb7+ { +M11/38
1.5s } 60... Kc5 { -M10/30 0.77s } 61. f7 { +M9/46 1.5s } 61... Kd4 {
-M8/33 0.55s } 62. f8=Q { +M7/46 0.80s } 62... Kc3 { -M6/36 0.72s } 63.
Qbb4+ { +M5/52 0.57s } 63... Kc2 { -M4/41 0.63s } 64. Qf2+ { +M3/116 0.047s
} 64... Kc1 { -M2/42 6.4s } 65. Qfd2# { +M1/116 0.004s, White mates } 1-0[/pgn]
Using data from Steven Pohl's rating list we get -
Code: Select all
PGN database : pgn\ka.pgn
Measure King Attacks : 83.900 games
Engine Won Loss Perc ATTACK
CSTal 2.1 EAS 1693 8156 17.2% 105676
Patricia 3.0 avx2 548 10487 5.0% 97395
Patricia 3.1 avx2 589 10460 5.3% 96068
Patricia 241106 avx2 1434 8232 14.8% 77902
Rebel Extreme avx2 2014 6490 23.7% 66522
Velvet 8.1.0 risky 1784 6761 20.9% 45813
Rebel EAS 2.0 avx2 4702 2886 62.0% 38882
Stockfish 231014 avx2 547 3 99.5% 38589
Stockfish 230911 avx2 547 6 98.9% 38566
Stockfish 231116 avx2 564 6 98.9% 37683
Stockfish 230929 avx2 559 5 99.1% 37369
Rebel EAS avx2 5630 12052 31.8% 36785
Stockfish 231024 avx2 559 4 99.3% 36223
Stockfish 231107 avx2 557 6 98.9% 35492250 CSTal king attacks in PGN, comments included.
The first one -
[pgn][Event "UHO Ratinglist"]
[Site ""]
[Date "2025.03.29"]
[Round "2"]
[White "CSTal 2.1 EAS"]
[Black "Koivisto 9.2 avx2"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
1. e4 { book } 1... e6 { book } 2. d4 { book } 2... d5 { book } 3. Nc3 {
book } 3... Bb4 { book } 4. e5 { book } 4... b6 { book } 5. a3 { book }
5... Bf8 { book } 6. Nf3 { book } 6... Ne7 { book } 7. Ne2 { +1.72/22 8.3s
} 7... Ba6 { -1.55/26 9.3s } 8. h4 { +1.70/25 9.1s } 8... c5 { -1.68/25
8.4s } 9. h5 { +1.64/24 5.4s } 9... Nec6 { -1.56/26 16s } 10. c3 { +1.50/21
7.3s } 10... Be7 { -1.25/24 6.8s } 11. Rh3 { +1.97/20 4.2s } 11... O-O {
-1.24/23 3.6s } 12. Rg3 { +1.88/22 5.8s } 12... Kh8 { -1.42/23 3.5s } 13.
Nf4 { +1.83/21 8.8s } 13... Bxf1 { -0.99/22 5.4s } 14. Kxf1 { +1.64/20 6.2s
} 14... h6 { -1.15/23 9.6s } 15. Qd3 { +1.60/20 6.7s } 15... Rg8 { -0.91/21
3.8s } 16. Rg6 { +1.83/17 4.3s } 16... Qc8 { -0.82/21 4.1s } 17. Kg1 {
+1.60/17 7.3s } 17... cxd4 { -0.89/24 12s } 18. cxd4 { +2.19/18 3.7s }
18... Nd7 { -0.85/23 3.1s } 19. Rxe6 { +2.57/19 3.2s } 19... Re8 { -1.01/22
2.9s } 20. Rxh6+ { +2.19/19 3.1s } 20... gxh6 { -0.06/23 2.1s } 21. e6 {
+1.81/18 3.6s } 21... fxe6 { -0.16/26 8.3s } 22. Qg6 { +3.27/19 8.2s }
22... Bf8 { -1.30/28 13s } 23. Qf7 { +2.04/20 4.2s } 23... Bg7 { -1.34/29
7.8s } 24. Ng6+ { +5.55/19 2.7s } 24... Kh7 { -1.34/1 0.001s } 25. Bxh6 {
+5.73/21 3.2s } 25... Kxh6 { -3.57/29 5.6s } 26. Qf4+ { +5.97/21 2.8s }
26... Kh7 { -3.28/31 7.6s } 27. Ng5+ { +6.01/22 3.9s } 27... Kh6 { -2.69/29
1.5s } 28. Nf3+ { 0.00/5 0.001s } 28... Kh7 { +0.05/128 0.004s } 29. Ng5+ {
0.00/4 0.001s } 29... Kh6 { +0.07/128 0.004s } 30. Nxe6+ { +5.92/22 5.7s }
30... Kh7 { -2.79/29 2.8s } 31. Ng5+ { +6.27/25 10s } 31... Kh6 { -3.45/28
3.5s } 32. Ne6+ { 0.00/4 0.001s } 32... Kh7 { -0.03/128 0.004s } 33. Ng5+ {
0.00/4 0.001s } 33... Kh6 { -0.01/128 0.004s } 34. Nh4 { +6.46/18 3.0s }
34... Nxd4 { -3.32/29 4.9s } 35. Nf5+ { +9.46/21 2.4s } 35... Kxh5 {
-3.42/28 2.3s } 36. g4+ { +10.09/24 5.9s } 36... Kg6 { -3.42/1 0.001s } 37.
Nh4+ { +10.01/24 2.7s } 37... Kh6 { -3.18/1 0.002s } 38. Qf7 { +10.15/25
3.0s } 38... Kxg5 { -7.77/25 15s } 39. Qxg7+ { +10.74/25 3.3s } 39... Kf4 {
-9.53/25 2.8s } 40. Ng2+ { +10.80/24 2.2s } 40... Ke4 { -4.86/27 1.7s } 41.
Qg6+ { +10.81/26 2.7s } 41... Kf3 { -12.71/27 11s } 42. Qd3+ { +11.01/26
4.1s } 42... Kxg4 { -14.90/29 3.8s } 43. Qg6+ { +11.13/24 2.6s } 43... Kf3
{ -15.08/29 1.5s } 44. Qh5+ { +11.26/22 2.1s } 44... Ke4 { -15.08/1 0.001s
} 45. Re1+ { +11.27/24 2.9s } 45... Kd3 { -15.43/27 1.7s } 46. Nf4+ {
+11.39/25 3.2s } 46... Kc2 { -15.51/27 1.5s } 47. Qd1+ { +11.52/23 2.7s }
47... Kxb2 { -15.51/1 0.001s } 48. Qxd4+ { +11.65/24 2.5s } 48... Qc3 {
-15.70/26 2.9s } 49. Nd3+ { +11.58/23 2.2s } 49... Ka2 { -15.74/25 1.8s }
50. Qxc3 { +11.63/25 4.1s } 50... Rxe1+ { -16.20/25 7.0s } 51. Qxe1 {
+11.84/24 3.5s } 51... Rc8 { -15.63/23 3.0s } 52. Qd2+ { +12.10/21 2.9s }
52... Kb3 { -16.47/22 1.3s } 53. Qb2+ { +11.85/21 2.5s } 53... Kc4 {
-16.51/21 0.85s } 54. Qc2+ { +12.26/22 2.4s } 54... Kb5 { -16.64/22 4.8s }
55. Qxc8 { +14.47/18 4.1s } 55... Nc5 { -16.70/20 0.93s } 56. Nxc5 {
+14.89/17 1.7s } 56... bxc5 { -18.20/18 1.00s } 57. f4 { +16.08/17 1.4s }
57... d4 { -22.54/20 4.4s } 58. f5 { +M23/18 1.1s } 58... c4 { -27.23/20
5.2s } 59. f6 { +M13/27 1.4s } 59... d3 { -M12/26 2.3s } 60. Qb7+ { +M11/38
1.5s } 60... Kc5 { -M10/30 0.77s } 61. f7 { +M9/46 1.5s } 61... Kd4 {
-M8/33 0.55s } 62. f8=Q { +M7/46 0.80s } 62... Kc3 { -M6/36 0.72s } 63.
Qbb4+ { +M5/52 0.57s } 63... Kc2 { -M4/41 0.63s } 64. Qf2+ { +M3/116 0.047s
} 64... Kc1 { -M2/42 6.4s } 65. Qfd2# { +M1/116 0.004s, White mates } 1-0[/pgn]
90% of coding is debugging, the other 10% is writing bugs.
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mclane
- Posts: 18881
- Joined: Thu Mar 09, 2006 6:40 pm
- Location: US of Europe, germany
- Full name: Thorsten Czub
Re: Chess System Tal 2.1 EAS
Impressing
What seems like a fairy tale today may be reality tomorrow.
Here we have a fairy tale of the day after tomorrow....
Here we have a fairy tale of the day after tomorrow....
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Peter Berger
- Posts: 736
- Joined: Thu Mar 09, 2006 2:56 pm
Re: Chess System Tal 2.1 EAS
What I really like about Chess System Tal 2.1 so far is the way the games develop if for some reason it doesn't get the chances to set up the usual often enough favourable mess (e.g. because the opponent is plenty strong).
This is a clear weakness of Patricia - sometimes it just looks plain dumb and overtuned with its sacs even for mediocre humans. With CST you get something like this, which looks respectable enough:
[Event "Lang 120min+10sek"]
[Site "Berlin"]
[Date "2025.05.12"]
[Round "?"]
[White "Lc0 v0.31.2"]
[Black "Chess System Tal 2.1 EAS"]
[Result "1/2-1/2"]
[ECO "E08"]
[PlyCount "112"]
[TimeControl "7200+10"]
{4096MB, DESKTOP-8OCGGEO} 1. d4 {[%emt 0:00:00]} Nf6 {[%eval 58,31] [%emt 0:06:39]} 2. c4 {[%emt 0:02:22]} e6 {[%eval 58,31] [%emt 0:04:34]} 3. g3 {[%emt 0:02:53] (Sc3)} Bb4+ {[%eval 37,27] [%emt 0:01:03]} 4. Bd2 {[%emt 0:02:51]} Be7 {[%eval 36,32] [%emt 0:01:08]} 5. Qc2 {[%emt 0:03:17] (Lg2)} d5 {[%eval -15,26] [%emt 0:02:41]} 6. Bg2 {[%emt 0:03:15] (Sf3)} O-O {[%eval 23,29] [%emt 0:05:02]} 7. Nf3 {[%emt 0:01:27]} c6 {[%eval 41,31] [%emt 0:03:36]} 8. O-O {[%emt 0:01:34]} b6 {[%eval 48,29] [%emt 0:00:39]} 9. Rd1 {[%emt 0:05:58] (Sc3)} Nbd7 {[%eval 15,24] [%emt 0:00:55]} 10. Bf4 {[%emt 0:00:26] (Sc3)} Bb7 {[%eval 34,28] [%emt 0:03:16]} 11. Nc3 {[%emt 0:01:27] (Se5)} dxc4 {[%eval 0,30] [%emt 0:00:51]} 12. Nd2 {[%emt 0:01:39] (Se4)} Nd5 {[%eval 17,30] [%emt 0:02:27]} 13. Nxc4 {[%emt 0:00:49]} Nxf4 {[%eval -29,29] [%emt 0:07:22]} 14. gxf4 {[%emt 0:00:18]} Qc7 {[%eval 34,29] [%emt 0:06:41]} 15. e3 {[%emt 0:01:36]} Rad8 {[%eval 46,29] [%emt 0:00:38]} 16. a4 {[%emt 0:11:24] (Tac1)} Bb4 {[%eval 15,28] [%emt 0:02:53]} 17. Ne2 {[%emt 0:02:18] (a5)} a5 {[%eval 0,34] [%emt 0:02:22]} 18. Rac1 {[%emt 0:05:13] (Sg3)} Nf6 {[%eval 0,36] [%emt 0:01:41]} 19. Ng3 {[%emt 0:01:37]} c5 {[%eval 0,37] [%emt 0:03:59]} 20. Bxb7 {[%emt 0:02:22]} Qxb7 {[%eval 0,38] [%emt 0:01:37]} 21. dxc5 {[%emt 0:01:05]} bxc5 {[%eval 0,38] [%emt 0:01:53]} 22. f5 {[%emt 0:05:14] (Se5)} Qc6 {[%eval 0,33] [%emt 0:01:46]} 23. b3 {[%emt 0:04:30]} g6 {[%eval 0,38] [%emt 0:02:47]} 24. fxg6 {[%emt 0:01:57]} hxg6 {[%eval 0,36] [%emt 0:01:32]} 25. Qb2 {[%emt 0:03:09] (Se5)} Qf3 {[%eval 0,37] [%emt 0:02:39]} 26. Qc2 {[%emt 0:04:45]} Qc6 {[%eval 0,37] [%emt 0:00:36]} 27. Qe2 {[%emt 0:03:05]} Qb7 {[%eval 0,28] [%emt 0:01:50]} 28. h4 {[%emt 0:02:38]} Rd5 {[%eval 0,33] [%emt 0:01:30]} 29. e4 {[%emt 0:02:20]} Rxd1+ {[%eval -10,35] [%emt 0:07:08]} 30. Rxd1 {[%emt 0:00:15] (Dxd1)} Bc3 {[%eval 0,34] [%emt 0:01:33]} 31. Qc2 {[%emt 0:00:28] (Dd3)} Bd4 {[%eval 0,31] [%emt 0:01:04]} 32. Nxa5 {[%emt 0:01:08]} Qb6 {[%eval 0,32] [%emt 0:01:22]} 33. Nc4 {[%emt 0:03:37]} Qb8 {[%eval 0,34] [%emt 0:01:21]} 34. Kg2 {[%emt 0:02:27]} Kg7 {[%eval 0,35] [%emt 0:01:27]} 35. Qd3 {[%emt 0:03:50] (Th1)} Rh8 {[%eval 0,27] [%emt 0:01:02]} 36. Rh1 {[%emt 0:02:55]} Ng4 {[%eval 0,31] [%emt 0:01:30]} 37. Qf3 {[%emt 0:01:25]} Nxf2 {[%eval 22,33] [%emt 0:05:50]} 38. Rf1 {[%emt 0:00:40]} Rxh4 {[%eval 22,30] [%emt 0:01:08]} 39. Rxf2 {[%emt 0:01:12]} Bxf2 {[%eval 28,31] [%emt 0:03:04]} 40. Qxf2 {[%emt 0:00:36]} Qh8 {[%eval 48,28] [%emt 0:00:44]} 41. Qg1 {[%emt 0:03:05] (Kg1)} Kg8 {[%eval 12,28] [%emt 0:00:58]} 42. a5 {[%emt 0:01:51]} Rh3 {[%eval 0,35] [%emt 0:01:48]} 43. Nd2 {[%emt 0:02:09]} Rh7 {[%eval 1,32] [%emt 0:00:39]} 44. a6 {[%emt 0:01:58]} Qb2 {[%eval 0,34] [%emt 0:05:32]} 45. Qe3 {[%emt 0:06:55] (Df2)} Qa1 {[%eval 0,28] [%emt 0:01:54]} 46. e5 {[%emt 0:05:57] (Dd3)} Rh8 {[%eval 0,32] [%emt 0:00:30]} 47. Nf3 {[%emt 0:04:48]} Qxa6 {[%eval 0,37] [%emt 0:02:00]} 48. Ne4 {[%emt 0:00:41]} Qa2+ {[%eval 0,37] [%emt 0:02:14]} 49. Kg3 {[%emt 0:00:31]} Qb1 {[%eval 0,37] [%emt 0:00:58]} 50. Qf4 {[%emt 0:01:54] (Dg5)} Qxb3 {[%eval 0,36] [%emt 0:00:42]} 51. Qf6 {[%emt 0:05:54]} Qb8 {[%eval 0,41] [%emt 0:00:54]} 52. Nd6 {[%emt 0:02:18] (Sfg5)} Rh7 {[%eval 0,37] [%emt 0:00:36]} 53. Ng5 {[%emt 0:03:04] (Se4)} Qb3+ {[%eval 0,40] [%emt 0:00:28]} 54. Nf3 {[%emt 0:00:53]} Qb8 {[%eval 0,44] [%emt 0:00:15]} 55. Kg4 {[%emt 0:02:10]} Qb4+ {[%eval 0,37] [%emt 0:00:29]} 56. Kg3 {[%emt 0:00:37]} Qb8 {[%eval 0,45] [%emt 0:00:44]} 1/2-1/2
This is a clear weakness of Patricia - sometimes it just looks plain dumb and overtuned with its sacs even for mediocre humans. With CST you get something like this, which looks respectable enough:
[Event "Lang 120min+10sek"]
[Site "Berlin"]
[Date "2025.05.12"]
[Round "?"]
[White "Lc0 v0.31.2"]
[Black "Chess System Tal 2.1 EAS"]
[Result "1/2-1/2"]
[ECO "E08"]
[PlyCount "112"]
[TimeControl "7200+10"]
{4096MB, DESKTOP-8OCGGEO} 1. d4 {[%emt 0:00:00]} Nf6 {[%eval 58,31] [%emt 0:06:39]} 2. c4 {[%emt 0:02:22]} e6 {[%eval 58,31] [%emt 0:04:34]} 3. g3 {[%emt 0:02:53] (Sc3)} Bb4+ {[%eval 37,27] [%emt 0:01:03]} 4. Bd2 {[%emt 0:02:51]} Be7 {[%eval 36,32] [%emt 0:01:08]} 5. Qc2 {[%emt 0:03:17] (Lg2)} d5 {[%eval -15,26] [%emt 0:02:41]} 6. Bg2 {[%emt 0:03:15] (Sf3)} O-O {[%eval 23,29] [%emt 0:05:02]} 7. Nf3 {[%emt 0:01:27]} c6 {[%eval 41,31] [%emt 0:03:36]} 8. O-O {[%emt 0:01:34]} b6 {[%eval 48,29] [%emt 0:00:39]} 9. Rd1 {[%emt 0:05:58] (Sc3)} Nbd7 {[%eval 15,24] [%emt 0:00:55]} 10. Bf4 {[%emt 0:00:26] (Sc3)} Bb7 {[%eval 34,28] [%emt 0:03:16]} 11. Nc3 {[%emt 0:01:27] (Se5)} dxc4 {[%eval 0,30] [%emt 0:00:51]} 12. Nd2 {[%emt 0:01:39] (Se4)} Nd5 {[%eval 17,30] [%emt 0:02:27]} 13. Nxc4 {[%emt 0:00:49]} Nxf4 {[%eval -29,29] [%emt 0:07:22]} 14. gxf4 {[%emt 0:00:18]} Qc7 {[%eval 34,29] [%emt 0:06:41]} 15. e3 {[%emt 0:01:36]} Rad8 {[%eval 46,29] [%emt 0:00:38]} 16. a4 {[%emt 0:11:24] (Tac1)} Bb4 {[%eval 15,28] [%emt 0:02:53]} 17. Ne2 {[%emt 0:02:18] (a5)} a5 {[%eval 0,34] [%emt 0:02:22]} 18. Rac1 {[%emt 0:05:13] (Sg3)} Nf6 {[%eval 0,36] [%emt 0:01:41]} 19. Ng3 {[%emt 0:01:37]} c5 {[%eval 0,37] [%emt 0:03:59]} 20. Bxb7 {[%emt 0:02:22]} Qxb7 {[%eval 0,38] [%emt 0:01:37]} 21. dxc5 {[%emt 0:01:05]} bxc5 {[%eval 0,38] [%emt 0:01:53]} 22. f5 {[%emt 0:05:14] (Se5)} Qc6 {[%eval 0,33] [%emt 0:01:46]} 23. b3 {[%emt 0:04:30]} g6 {[%eval 0,38] [%emt 0:02:47]} 24. fxg6 {[%emt 0:01:57]} hxg6 {[%eval 0,36] [%emt 0:01:32]} 25. Qb2 {[%emt 0:03:09] (Se5)} Qf3 {[%eval 0,37] [%emt 0:02:39]} 26. Qc2 {[%emt 0:04:45]} Qc6 {[%eval 0,37] [%emt 0:00:36]} 27. Qe2 {[%emt 0:03:05]} Qb7 {[%eval 0,28] [%emt 0:01:50]} 28. h4 {[%emt 0:02:38]} Rd5 {[%eval 0,33] [%emt 0:01:30]} 29. e4 {[%emt 0:02:20]} Rxd1+ {[%eval -10,35] [%emt 0:07:08]} 30. Rxd1 {[%emt 0:00:15] (Dxd1)} Bc3 {[%eval 0,34] [%emt 0:01:33]} 31. Qc2 {[%emt 0:00:28] (Dd3)} Bd4 {[%eval 0,31] [%emt 0:01:04]} 32. Nxa5 {[%emt 0:01:08]} Qb6 {[%eval 0,32] [%emt 0:01:22]} 33. Nc4 {[%emt 0:03:37]} Qb8 {[%eval 0,34] [%emt 0:01:21]} 34. Kg2 {[%emt 0:02:27]} Kg7 {[%eval 0,35] [%emt 0:01:27]} 35. Qd3 {[%emt 0:03:50] (Th1)} Rh8 {[%eval 0,27] [%emt 0:01:02]} 36. Rh1 {[%emt 0:02:55]} Ng4 {[%eval 0,31] [%emt 0:01:30]} 37. Qf3 {[%emt 0:01:25]} Nxf2 {[%eval 22,33] [%emt 0:05:50]} 38. Rf1 {[%emt 0:00:40]} Rxh4 {[%eval 22,30] [%emt 0:01:08]} 39. Rxf2 {[%emt 0:01:12]} Bxf2 {[%eval 28,31] [%emt 0:03:04]} 40. Qxf2 {[%emt 0:00:36]} Qh8 {[%eval 48,28] [%emt 0:00:44]} 41. Qg1 {[%emt 0:03:05] (Kg1)} Kg8 {[%eval 12,28] [%emt 0:00:58]} 42. a5 {[%emt 0:01:51]} Rh3 {[%eval 0,35] [%emt 0:01:48]} 43. Nd2 {[%emt 0:02:09]} Rh7 {[%eval 1,32] [%emt 0:00:39]} 44. a6 {[%emt 0:01:58]} Qb2 {[%eval 0,34] [%emt 0:05:32]} 45. Qe3 {[%emt 0:06:55] (Df2)} Qa1 {[%eval 0,28] [%emt 0:01:54]} 46. e5 {[%emt 0:05:57] (Dd3)} Rh8 {[%eval 0,32] [%emt 0:00:30]} 47. Nf3 {[%emt 0:04:48]} Qxa6 {[%eval 0,37] [%emt 0:02:00]} 48. Ne4 {[%emt 0:00:41]} Qa2+ {[%eval 0,37] [%emt 0:02:14]} 49. Kg3 {[%emt 0:00:31]} Qb1 {[%eval 0,37] [%emt 0:00:58]} 50. Qf4 {[%emt 0:01:54] (Dg5)} Qxb3 {[%eval 0,36] [%emt 0:00:42]} 51. Qf6 {[%emt 0:05:54]} Qb8 {[%eval 0,41] [%emt 0:00:54]} 52. Nd6 {[%emt 0:02:18] (Sfg5)} Rh7 {[%eval 0,37] [%emt 0:00:36]} 53. Ng5 {[%emt 0:03:04] (Se4)} Qb3+ {[%eval 0,40] [%emt 0:00:28]} 54. Nf3 {[%emt 0:00:53]} Qb8 {[%eval 0,44] [%emt 0:00:15]} 55. Kg4 {[%emt 0:02:10]} Qb4+ {[%eval 0,37] [%emt 0:00:29]} 56. Kg3 {[%emt 0:00:37]} Qb8 {[%eval 0,45] [%emt 0:00:44]} 1/2-1/2
-
Ajedrecista
- Posts: 2095
- Joined: Wed Jul 13, 2011 9:04 pm
- Location: Madrid, Spain.
Re: Chess System Tal 2.1 EAS.
Hello:
There is algebraic notation in German for the suggested moves between brackets: K for King (the same than in English, hence been recognized the king figure), D for Queen, L for Bishop and S for Knight.
Regards from Spain.
Ajedrecista.
Enclosing the quoted post with PGN tags for a better visualization of the game. Friendly reminder:Peter Berger wrote: ↑Mon May 12, 2025 6:14 pm What I really like about Chess System Tal 2.1 so far is the way the games develop if for some reason it doesn't get the chances to set up the usual often enough favourable mess (e.g. because the opponent is plenty strong).
This is a clear weakness of Patricia - sometimes it just looks plain dumb and overtuned with its sacs even for mediocre humans. With CST you get something like this, which looks respectable enough:
[pgn][Event "Lang 120min+10sek"]
[Site "Berlin"]
[Date "2025.05.12"]
[Round "?"]
[White "Lc0 v0.31.2"]
[Black "Chess System Tal 2.1 EAS"]
[Result "1/2-1/2"]
[ECO "E08"]
[PlyCount "112"]
[TimeControl "7200+10"]
{4096MB, DESKTOP-8OCGGEO} 1. d4 {[%emt 0:00:00]} Nf6 {[%eval 58,31] [%emt 0:06:39]} 2. c4 {[%emt 0:02:22]} e6 {[%eval 58,31] [%emt 0:04:34]} 3. g3 {[%emt 0:02:53] (Sc3)} Bb4+ {[%eval 37,27] [%emt 0:01:03]} 4. Bd2 {[%emt 0:02:51]} Be7 {[%eval 36,32] [%emt 0:01:08]} 5. Qc2 {[%emt 0:03:17] (Lg2)} d5 {[%eval -15,26] [%emt 0:02:41]} 6. Bg2 {[%emt 0:03:15] (Sf3)} O-O {[%eval 23,29] [%emt 0:05:02]} 7. Nf3 {[%emt 0:01:27]} c6 {[%eval 41,31] [%emt 0:03:36]} 8. O-O {[%emt 0:01:34]} b6 {[%eval 48,29] [%emt 0:00:39]} 9. Rd1 {[%emt 0:05:58] (Sc3)} Nbd7 {[%eval 15,24] [%emt 0:00:55]} 10. Bf4 {[%emt 0:00:26] (Sc3)} Bb7 {[%eval 34,28] [%emt 0:03:16]} 11. Nc3 {[%emt 0:01:27] (Se5)} dxc4 {[%eval 0,30] [%emt 0:00:51]} 12. Nd2 {[%emt 0:01:39] (Se4)} Nd5 {[%eval 17,30] [%emt 0:02:27]} 13. Nxc4 {[%emt 0:00:49]} Nxf4 {[%eval -29,29] [%emt 0:07:22]} 14. gxf4 {[%emt 0:00:18]} Qc7 {[%eval 34,29] [%emt 0:06:41]} 15. e3 {[%emt 0:01:36]} Rad8 {[%eval 46,29] [%emt 0:00:38]} 16. a4 {[%emt 0:11:24] (Tac1)} Bb4 {[%eval 15,28] [%emt 0:02:53]} 17. Ne2 {[%emt 0:02:18] (a5)} a5 {[%eval 0,34] [%emt 0:02:22]} 18. Rac1 {[%emt 0:05:13] (Sg3)} Nf6 {[%eval 0,36] [%emt 0:01:41]} 19. Ng3 {[%emt 0:01:37]} c5 {[%eval 0,37] [%emt 0:03:59]} 20. Bxb7 {[%emt 0:02:22]} Qxb7 {[%eval 0,38] [%emt 0:01:37]} 21. dxc5 {[%emt 0:01:05]} bxc5 {[%eval 0,38] [%emt 0:01:53]} 22. f5 {[%emt 0:05:14] (Se5)} Qc6 {[%eval 0,33] [%emt 0:01:46]} 23. b3 {[%emt 0:04:30]} g6 {[%eval 0,38] [%emt 0:02:47]} 24. fxg6 {[%emt 0:01:57]} hxg6 {[%eval 0,36] [%emt 0:01:32]} 25. Qb2 {[%emt 0:03:09] (Se5)} Qf3 {[%eval 0,37] [%emt 0:02:39]} 26. Qc2 {[%emt 0:04:45]} Qc6 {[%eval 0,37] [%emt 0:00:36]} 27. Qe2 {[%emt 0:03:05]} Qb7 {[%eval 0,28] [%emt 0:01:50]} 28. h4 {[%emt 0:02:38]} Rd5 {[%eval 0,33] [%emt 0:01:30]} 29. e4 {[%emt 0:02:20]} Rxd1+ {[%eval -10,35] [%emt 0:07:08]} 30. Rxd1 {[%emt 0:00:15] (Dxd1)} Bc3 {[%eval 0,34] [%emt 0:01:33]} 31. Qc2 {[%emt 0:00:28] (Dd3)} Bd4 {[%eval 0,31] [%emt 0:01:04]} 32. Nxa5 {[%emt 0:01:08]} Qb6 {[%eval 0,32] [%emt 0:01:22]} 33. Nc4 {[%emt 0:03:37]} Qb8 {[%eval 0,34] [%emt 0:01:21]} 34. Kg2 {[%emt 0:02:27]} Kg7 {[%eval 0,35] [%emt 0:01:27]} 35. Qd3 {[%emt 0:03:50] (Th1)} Rh8 {[%eval 0,27] [%emt 0:01:02]} 36. Rh1 {[%emt 0:02:55]} Ng4 {[%eval 0,31] [%emt 0:01:30]} 37. Qf3 {[%emt 0:01:25]} Nxf2 {[%eval 22,33] [%emt 0:05:50]} 38. Rf1 {[%emt 0:00:40]} Rxh4 {[%eval 22,30] [%emt 0:01:08]} 39. Rxf2 {[%emt 0:01:12]} Bxf2 {[%eval 28,31] [%emt 0:03:04]} 40. Qxf2 {[%emt 0:00:36]} Qh8 {[%eval 48,28] [%emt 0:00:44]} 41. Qg1 {[%emt 0:03:05] (Kg1)} Kg8 {[%eval 12,28] [%emt 0:00:58]} 42. a5 {[%emt 0:01:51]} Rh3 {[%eval 0,35] [%emt 0:01:48]} 43. Nd2 {[%emt 0:02:09]} Rh7 {[%eval 1,32] [%emt 0:00:39]} 44. a6 {[%emt 0:01:58]} Qb2 {[%eval 0,34] [%emt 0:05:32]} 45. Qe3 {[%emt 0:06:55] (Df2)} Qa1 {[%eval 0,28] [%emt 0:01:54]} 46. e5 {[%emt 0:05:57] (Dd3)} Rh8 {[%eval 0,32] [%emt 0:00:30]} 47. Nf3 {[%emt 0:04:48]} Qxa6 {[%eval 0,37] [%emt 0:02:00]} 48. Ne4 {[%emt 0:00:41]} Qa2+ {[%eval 0,37] [%emt 0:02:14]} 49. Kg3 {[%emt 0:00:31]} Qb1 {[%eval 0,37] [%emt 0:00:58]} 50. Qf4 {[%emt 0:01:54] (Dg5)} Qxb3 {[%eval 0,36] [%emt 0:00:42]} 51. Qf6 {[%emt 0:05:54]} Qb8 {[%eval 0,41] [%emt 0:00:54]} 52. Nd6 {[%emt 0:02:18] (Sfg5)} Rh7 {[%eval 0,37] [%emt 0:00:36]} 53. Ng5 {[%emt 0:03:04] (Se4)} Qb3+ {[%eval 0,40] [%emt 0:00:28]} 54. Nf3 {[%emt 0:00:53]} Qb8 {[%eval 0,44] [%emt 0:00:15]} 55. Kg4 {[%emt 0:02:10]} Qb4+ {[%eval 0,37] [%emt 0:00:29]} 56. Kg3 {[%emt 0:00:37]} Qb8 {[%eval 0,45] [%emt 0:00:44]} 1/2-1/2[/pgn]
Code: Select all
==========
IMPORTANT:
==========
Replace < by [
Replace > by ]
<pgn>
PGN STUFF.
MORE PGN STUFF.
</pgn>Regards from Spain.
Ajedrecista.
-
Rebel
- Posts: 7293
- Joined: Thu Aug 18, 2011 12:04 pm
- Full name: Ed Schröder
Re: Chess System Tal 2.1 EAS
[pgn][Event "UHO Ratinglist"]
[Site "?"]
[Date "2025.3.30"]
[Round "120"]
[White "CSTal 2.1 EAS"]
[Black "Stockfish final HCE"]
[Result "1-0"]
1. Nf3 { book } 1... d5 { book } 2. g3 { book } 2... Nc6 { book } 3. d4 { book }
3... Bg4 { book } 4. Bg2 { book } 4... Qd7 { book } 5. h3 { book } 5... Bf5 {
book } 6. c3 { book } 6... O-O-O { book } 7. b4 { +1.53/21 8.4s } 7... f6 {
-0.87/24 17s } 8. b5 { +1.43/21 5.0s } 8... Na5 { -0.06/20 1.5s } 9. Qa4 {
+1.24/21 5.4s } 9... b6 { 0.00/23 2.8s } 10. Nbd2 { +1.55/19 5.4s } 10... a6 {
+0.56/20 2.4s } 11. Nh4 { +2.29/19 7.5s } 11... Be6 { +0.48/23 5.7s } 12. Rb1 {
+2.14/19 4.4s } 12... Bf7 { +0.60/21 2.1s } 13. O-O { +1.60/18 7.5s } 13... g5 {
+0.47/27 11s } 14. Nf5 { +1.92/19 5.8s } 14... Qxf5 { +1.96/22 2.4s } 15. c4 {
+2.22/19 5.9s } 15... Qd7 { +2.74/21 2.5s } 16. Nb3 { +3.70/20 7.2s } 16... Nxc4
{ +2.77/22 2.5s } 17. Nc5 { +5.75/19 5.5s } 17... bxc5 { +2.66/26 8.0s } 18. dxc5
{ +4.92/20 5.6s } 18... Kb8 { +2.97/27 6.2s } 19. Be3 { +7.61/17 2.7s } 19... a5
{ -3.20/26 14s } 20. c6 { +7.78/17 5.3s } 20... Qc8 { -3.97/24 5.5s } 21. b6 {
+6.95/20 3.4s } 21... Qa6 { -4.02/28 13s } 22. Rfc1 { +6.73/21 3.4s } 22... Nxe3
{ -1.47/25 2.4s } 23. bxc7+ { +6.94/21 4.4s } 23... Kxc7 { -4.29/28 6.4s }
24. Rb7+ { +6.72/21 3.8s } 24... Kc8 { -3.59/26 2.9s } 25. Rcb1 { +6.73/22 3.0s
} 25... Nc4 { -4.09/29 5.6s } 26. e4 { +6.88/22 8.9s } 26... e6 { -3.98/26 5.3s
} 27. Rb8+ { +6.86/21 2.7s } 27... Kc7 { -3.98/7 0.001s } 28. R1b7+ { +6.90/22
9.4s } 28... Qxb7 { -4.35/29 3.7s } 29. Rxb7+ { +6.86/20 2.7s } 29... Kd6 {
-4.55/30 4.8s } 30. exd5 { +6.78/23 4.7s } 30... exd5 { -4.57/28 3.0s } 31. Rxf7
{ +6.98/23 2.9s } 31... Ne7 { -4.66/27 3.0s } 32. Rxf6+ { +7.04/22 2.3s } 32... Kc7
{ -4.09/24 5.3s } 33. Qb5 { +7.01/17 2.4s } 33... Nb6 { -4.82/26 4.7s } 34. Rf7
{ +7.22/20 3.2s } 34... Rg8 { -5.46/29 22s } 35. Qa6 { +7.46/21 2.8s } 35... Kxc6
{ -5.50/22 1.9s } 36. Rf6+ { +7.60/23 3.1s } 36... Rd6 { -5.61/24 3.1s } 37. Rxd6+
{ +7.83/22 3.1s } 37... Kxd6 { -5.61/21 2.1s } 38. Qxb6+ { +7.74/21 2.2s }
38... Ke5 { -5.70/23 3.0s } 39. Bf3 { +8.15/18 5.1s } 39... Rg7 { -6.71/27 26s
} 40. Qb8+ { +9.49/19 2.5s } 40... Kf6 { -7.13/23 2.5s } 41. Qxf8+ { +9.66/21
1.9s } 41... Rf7 { -7.28/23 2.0s } 42. Qh8+ { +10.04/22 3.4s } 42... Kg6 {
-7.66/27 6.8s } 43. Bg4 { +10.18/23 4.5s } 43... d4 { -7.87/25 2.1s } 44. Be2 {
+10.39/23 3.6s } 44... d3 { -6.46/17 0.22s } 45. Bxd3+ { +12.55/22 5.6s } 45... Kh6
{ -6.62/19 0.64s } 46. Qe8 { +13.77/20 2.9s } 46... Rg7 { -11.51/20 2.3s }
47. h4 { +14.34/21 3.4s } 47... g4 { -28.83/21 2.1s } 48. Qd8 { +19.63/20 1.7s
} 48... Rf7 { -M18/23 0.35s } 49. Bc4 { +21.55/21 1.6s } 49... Ng6 { -M16/31
0.18s } 50. Bxf7 { +23.26/21 1.3s } 50... Kg7 { -M10/33 0.28s } 51. Qg8+ {
+M27/25 1.4s } 51... Kf6 { -M12/26 0.33s } 52. Bc4 { +M17/32 1.9s } 52... a4 {
-M10/53 0.36s } 53. Qe6+ { +M11/53 1.00s } 53... Kg7 { -M8/2 0s } 54. Qf7+ {
+M9/70 0.82s } 54... Kh6 { -M6/245 0.17s } 55. Qg8 { +M7/97 0.54s } 55... a3 {
-M6/245 0.13s } 56. Bd3 { +M5/116 0.099s } 56... Nxh4 { -M4/245 0.014s } 57. Qxh7+
{ +M3/116 0.009s } 57... Kg5 { -M2/1 0s } 58. Qxh4# { +M1/116 0.004s, White
mates } 1-0[/pgn]
This a typical game for CSTal.
Note 14.Nf5 a knight sacrifice with a positive score of +1.92 black happily accepts with Qxf5 also with a positive score of 1.96, so a difference in evaluation of almost 4 pawns.
15.c4 Qd7 the difference in evaluation score is now 5 pawns.
16. Nb3 Nxc4 the difference in evaluation score is now 6 pawns.
17. Nc5 evaluation score difference is now 8 pawns, black has no idea what's coming to him.
20...Qc8 finally SF12 HCE (the search wonder) sees the loss.
Classic search vs evaluation example.
[Q] which engines find move 14, 15, 16 and 17?
[Site "?"]
[Date "2025.3.30"]
[Round "120"]
[White "CSTal 2.1 EAS"]
[Black "Stockfish final HCE"]
[Result "1-0"]
1. Nf3 { book } 1... d5 { book } 2. g3 { book } 2... Nc6 { book } 3. d4 { book }
3... Bg4 { book } 4. Bg2 { book } 4... Qd7 { book } 5. h3 { book } 5... Bf5 {
book } 6. c3 { book } 6... O-O-O { book } 7. b4 { +1.53/21 8.4s } 7... f6 {
-0.87/24 17s } 8. b5 { +1.43/21 5.0s } 8... Na5 { -0.06/20 1.5s } 9. Qa4 {
+1.24/21 5.4s } 9... b6 { 0.00/23 2.8s } 10. Nbd2 { +1.55/19 5.4s } 10... a6 {
+0.56/20 2.4s } 11. Nh4 { +2.29/19 7.5s } 11... Be6 { +0.48/23 5.7s } 12. Rb1 {
+2.14/19 4.4s } 12... Bf7 { +0.60/21 2.1s } 13. O-O { +1.60/18 7.5s } 13... g5 {
+0.47/27 11s } 14. Nf5 { +1.92/19 5.8s } 14... Qxf5 { +1.96/22 2.4s } 15. c4 {
+2.22/19 5.9s } 15... Qd7 { +2.74/21 2.5s } 16. Nb3 { +3.70/20 7.2s } 16... Nxc4
{ +2.77/22 2.5s } 17. Nc5 { +5.75/19 5.5s } 17... bxc5 { +2.66/26 8.0s } 18. dxc5
{ +4.92/20 5.6s } 18... Kb8 { +2.97/27 6.2s } 19. Be3 { +7.61/17 2.7s } 19... a5
{ -3.20/26 14s } 20. c6 { +7.78/17 5.3s } 20... Qc8 { -3.97/24 5.5s } 21. b6 {
+6.95/20 3.4s } 21... Qa6 { -4.02/28 13s } 22. Rfc1 { +6.73/21 3.4s } 22... Nxe3
{ -1.47/25 2.4s } 23. bxc7+ { +6.94/21 4.4s } 23... Kxc7 { -4.29/28 6.4s }
24. Rb7+ { +6.72/21 3.8s } 24... Kc8 { -3.59/26 2.9s } 25. Rcb1 { +6.73/22 3.0s
} 25... Nc4 { -4.09/29 5.6s } 26. e4 { +6.88/22 8.9s } 26... e6 { -3.98/26 5.3s
} 27. Rb8+ { +6.86/21 2.7s } 27... Kc7 { -3.98/7 0.001s } 28. R1b7+ { +6.90/22
9.4s } 28... Qxb7 { -4.35/29 3.7s } 29. Rxb7+ { +6.86/20 2.7s } 29... Kd6 {
-4.55/30 4.8s } 30. exd5 { +6.78/23 4.7s } 30... exd5 { -4.57/28 3.0s } 31. Rxf7
{ +6.98/23 2.9s } 31... Ne7 { -4.66/27 3.0s } 32. Rxf6+ { +7.04/22 2.3s } 32... Kc7
{ -4.09/24 5.3s } 33. Qb5 { +7.01/17 2.4s } 33... Nb6 { -4.82/26 4.7s } 34. Rf7
{ +7.22/20 3.2s } 34... Rg8 { -5.46/29 22s } 35. Qa6 { +7.46/21 2.8s } 35... Kxc6
{ -5.50/22 1.9s } 36. Rf6+ { +7.60/23 3.1s } 36... Rd6 { -5.61/24 3.1s } 37. Rxd6+
{ +7.83/22 3.1s } 37... Kxd6 { -5.61/21 2.1s } 38. Qxb6+ { +7.74/21 2.2s }
38... Ke5 { -5.70/23 3.0s } 39. Bf3 { +8.15/18 5.1s } 39... Rg7 { -6.71/27 26s
} 40. Qb8+ { +9.49/19 2.5s } 40... Kf6 { -7.13/23 2.5s } 41. Qxf8+ { +9.66/21
1.9s } 41... Rf7 { -7.28/23 2.0s } 42. Qh8+ { +10.04/22 3.4s } 42... Kg6 {
-7.66/27 6.8s } 43. Bg4 { +10.18/23 4.5s } 43... d4 { -7.87/25 2.1s } 44. Be2 {
+10.39/23 3.6s } 44... d3 { -6.46/17 0.22s } 45. Bxd3+ { +12.55/22 5.6s } 45... Kh6
{ -6.62/19 0.64s } 46. Qe8 { +13.77/20 2.9s } 46... Rg7 { -11.51/20 2.3s }
47. h4 { +14.34/21 3.4s } 47... g4 { -28.83/21 2.1s } 48. Qd8 { +19.63/20 1.7s
} 48... Rf7 { -M18/23 0.35s } 49. Bc4 { +21.55/21 1.6s } 49... Ng6 { -M16/31
0.18s } 50. Bxf7 { +23.26/21 1.3s } 50... Kg7 { -M10/33 0.28s } 51. Qg8+ {
+M27/25 1.4s } 51... Kf6 { -M12/26 0.33s } 52. Bc4 { +M17/32 1.9s } 52... a4 {
-M10/53 0.36s } 53. Qe6+ { +M11/53 1.00s } 53... Kg7 { -M8/2 0s } 54. Qf7+ {
+M9/70 0.82s } 54... Kh6 { -M6/245 0.17s } 55. Qg8 { +M7/97 0.54s } 55... a3 {
-M6/245 0.13s } 56. Bd3 { +M5/116 0.099s } 56... Nxh4 { -M4/245 0.014s } 57. Qxh7+
{ +M3/116 0.009s } 57... Kg5 { -M2/1 0s } 58. Qxh4# { +M1/116 0.004s, White
mates } 1-0[/pgn]
This a typical game for CSTal.
Note 14.Nf5 a knight sacrifice with a positive score of +1.92 black happily accepts with Qxf5 also with a positive score of 1.96, so a difference in evaluation of almost 4 pawns.
15.c4 Qd7 the difference in evaluation score is now 5 pawns.
16. Nb3 Nxc4 the difference in evaluation score is now 6 pawns.
17. Nc5 evaluation score difference is now 8 pawns, black has no idea what's coming to him.
20...Qc8 finally SF12 HCE (the search wonder) sees the loss.
Classic search vs evaluation example.
[Q] which engines find move 14, 15, 16 and 17?
90% of coding is debugging, the other 10% is writing bugs.
-
Peter Berger
- Posts: 736
- Joined: Thu Mar 09, 2006 2:56 pm
Re: Chess System Tal 2.1 EAS
Huh? I can't see any of the differences you give in the PGN you provided. What am I missing?Rebel wrote: ↑Mon May 12, 2025 8:29 pm
Note 14.Nf5 a knight sacrifice with a positive score of +1.92 black happily accepts with Qxf5 also with a positive score of 1.96, so a difference in evaluation of almost 4 pawns.
15.c4 Qd7 the difference in evaluation score is now 5 pawns.
16. Nb3 Nxc4 the difference in evaluation score is now 6 pawns.
17. Nc5 evaluation score difference is now 8 pawns, black has no idea what's coming to him.
20...Qc8 finally SF12 HCE (the search wonder) sees the loss.
Classic search vs evaluation example.
[Q] which engines find move 14, 15, 16 and 17?