Chess Engines Diary

This is prehistory 🙂 11 years ago:   Chess Engines Diary Elimination 28.07.2011 Time: 1', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory  Microsoft Windows XP Home Edition x32 GUI: Arena 3.0    All games 2011 download

CorChess is a clone of Stockfish maintained for better performance on long time controls, trying at least partially to fill the gap between regular tests and demands of correspondence players. Rating CEDR=3075 CorChess 2022-03-28 NNUE for Android - download

  Koivisto,  is a strong chess engine written primarily by Kim Kåhre and Finn Eggers in c++. Koivisto in itself is not a complete chess program and requires a UCI-compatible graphical user interface. Rating CEDR=3351 (8 place) Koivisto 8.4   (Ipman compiles)  - download

🕒🕓 15'+10"   💻 HP ENVY i5-8250U 8GB RAM  🗔 GUI Fritz 17 💾  100 tournament games    💾  All games CEDR  20.441 games   Table:  Scid vs PC   Firts Test Velvet 3.3.0  2022 Velvet 3.3.0    3185 - Blunder 7.6.0     2756   9.5 - 0.5    +9/=1/-0    95.00% Velvet 3.3.0    3185 - Cheese 3.0.1      2744   9.0 - 1.0    +8/=2/-0    90.00% Velvet 3.3.0    3185 - Critter 1.6a      3040   8.0 - 2.0    +6/=4/-0    80.00% Velvet 3.3.0    3185 - Fisherov 0.98i    3527   0.5 - 9.5    +0/=1/-9    5.00% Velvet 3.3.0    3185 - Fritz 17          3150   4.0 - 6.0    +1/=6/-3    40.00% Velvet 3.3.0    3185 - Igel 3.0.10       3320   2.5 - 7.5    +0/=5/-5    25.00% Velvet 3.3.0    3185 - KnightX 3.2       2890   9.5 - 0.5    +9/=1/-0    95.00% Velvet 3.3.0    3185 - Raubfisch X48e    3514   1.5 - 8.5    +0/=3/-7    15.00% Velvet 3.3.0    3185 - Stockfish 14.1    3506   2.5 - 7.5    +0/=5/-5    25.00% Velvet 3.3.0    3185 - Velvet 3.2.0      3185   6.0 - 4.0    +2/=8/-0    60.00%

This is prehistory 🙂 11 years ago:   Chess Engines Diary Elimination 28.07.2011 Time: 1', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory  Microsoft Windows XP Home Edition x32 GUI: Arena 3.0    All games 2011 download

Best progress:  Caissa 0.5  +65 . 🕒🕓 15'+10"   💻 HP Pavilion i5-1035G1 8GB RAM  🗔 GUI Fritz 17 💾  342 tournament games    💾  All games CEDR  20.441 games   Table:  Scid vs PC  

This is prehistory 🙂 11 years ago:   Chess Engines Diary Elimination 28.07.2011 Time: 1', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory  Microsoft Windows XP Home Edition x32 GUI: Arena 3.0    All games 2011 download

Stockfish - UCI chess engine, compiled by Michael Chaly Rating CEDR=3506 (2 place) Timestamp: 1648499829 In movepicker increase priority for moves that evade a capture This idea is a mix of koivisto idea of threat history and heuristic that  was simplified some time ago in LMR - decreasing reduction for moves that evade a capture.  Instead of doing so in LMR this patch does it in movepicker - to do this it  calculates squares that are attacked by different piece types and pieces that are located  on this squares and boosts up weight of moves that make this pieces land on a square that is not under threat. Boost is greater for pieces with bigger material values. Special thanks to koivisto and seer authors for explaining me ideas behind threat history. Passed STC: https://tests.stockfishchess.org/tests/view/62406e473b32264b9aa1478b LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 19816 W: 5320 L: 5072 D: 9424 Elo +4.35 Ptnml(0-2): 86, 2165, 5172, 2385, 100 Passed LTC: https://tests.sto

  From author: Kayra chess engine is a Stockfish based engine and it's an early development version. I have been working on this chess engine for a short time. Kayra is not an another Stockfish clone. I made very serious changes in the most critical parts of Stockfish, especially in the evaluation section. I made very agressive changes more than 50 parameters in the evalution code. I made very aggressive changes at psqt and pawns sections. I changed more than 250 parameters at psqt and pawns section. I weakened Stockfish a lot at the start of all these critical changes, but I'm finally getting close to balancing it. Although I made very critical changes in Stockfish codes and more than 300 parameters, the fact that Kayra didn' t perform badly gave me hope for the future. This version of Kayra is an early test version. If it reaches the level I want, there is no doubt that I' ll publish Kayra as open code source chess engine. Rating CEDR=3500 Chess engine: Kayra 1.3 dow

  Koivisto,  is a strong chess engine written primarily by Kim Kåhre and Finn Eggers in c++. Koivisto in itself is not a complete chess program and requires a UCI-compatible graphical user interface. Rating CEDR=3351 (8 place) Koivisto 8.3   (Ipman compiles)  - download

This is prehistory 🙂 11 years ago:   Chess Engines Diary Elimination 27-28.07.2011 Time: 1', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory  Microsoft Windows XP Home Edition x32 GUI: Arena 3.0    All games 2011 download

Mayhem - UCI chess engine , Author:  Toni Helminen Rating CEDR=2961 v.7 Some corrections in FEN handling Fixes / Speedups Mayhem 7 download

Clover - UCI chess engine Author: L uca Metehau Rating JCER=3146 3.1   Clover 3.1 is now available and it's about 200 elo stronger than 3.0 in self-play. Around half of it comes from using simd code and the other one comes from search improvements and new net arch. Some info about new net: trained on 500 mil positions generated from 3.0 and some 3.1 development version arch is: 768x512x1 training code can be found here: https://github.com/lucametehau/neuralnet Note: the avx2 binary was heavily recommended for use, so I decided to attach it only. (Sorry if you don't have avx2 on your cpu) Clover 3.1 download Individual statistics:  Clover 3.1 - 52 games CEDR (3'+3") +13,= 27,- 12, 51.0 % Schooner 2.2                  :   2 (+  0,=  2,-  0), 50.0 % Laser 1.7                     :   4 (+  1,=  3,-  0), 62.5 % Fritz 17                      :   4 (+  1,=  2,-  1), 50.0 % Xiphos 0.6.1                  :   4 (+  3,=  1,-  0), 87.5 % Wasp 5.50                     :   4 (+  0,

Best progress:  Caissa 0.5  +42 . 🕒🕓 15'+10"   💻 HP ENVY i5-8250U 8GB RAM  🗔 GUI Fritz 17 💾  182 tournament games    💾  All games CEDR  20.441 games   Table:  Scid vs PC  

This is prehistory 🙂 11 years ago:   Chess Engines Diary Elimination, 27.07.2011 Time: 2', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory  Microsoft Windows XP Home Edition x32 GUI: Arena 3.0    All games 2011 download

Chess engine: ProteusSF 005 (Stockfish derivative) ProteusSF 005 download

Author - Peter Osterlund, Rating CEDR=2773 Texel 1.08a18 dev.220324 for Android  download

This is prehistory 🙂 11 years ago:   Chess Engines Diary Tournament No 11, 26-27.07.2011 Time: 1', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory  Microsoft Windows XP Home Edition x32 GUI: Arena 3.0    All games 2011 download

This is prehistory 🙂 11 years ago:   Chess Engines Diary Tournament No 10, 26.07.2011 Time: 1'+10', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory  Microsoft Windows XP Home Edition x32 GUI: Arena 3.0    All games 2011 download

Ceres Release Notes - version 0.97RC3 Supports new networks with attention policy head (such as T79 or ap-mish networks) Adds major new feature for visual analysis of chess positions or games. See https://github.com/dje-dev/Ceres/blob/main/Graph.md Several small adjustments to play parameters (such as time control) Tournament Manager now supports variance reduction technique (force engine determinism) Various small fixes for use with tools such as Nibbler How to install   Ceres 0.97RC3 download

Promotion to Amateur League group E3:  Caissa 0.5, Rodent NNUE . Relegation to Amateur League E5 (elimination): Claudia 0.51, ChessMatrix 1.0.6 .  Best progress:  ChessKISS 1.8  +45 . 🕒🕓 15'+10"   💻 Lenovo Z710 i7-4710MG 8GB RAM  🗔 GUI Arena 💾  240 tournament games    💾  All games CEDR  20.441 games   Table:  Scid vs PC   League – TOP 64 1 League Edition 03 – temp 15’+10” Rating Score note 1. Stockfish 130222 3527 20.0 / 30 2. Dragon 2.6.1 3503 19.5 / 30 3. SugaR Al 2.50 3519 19.5 / 30 4. Lc0 0.28.2 3314 18.5 / 30 5. Fisherov 0.98j 3537 18.5 / 30 6. Raubfisch X48d2 3509 18.5 / 30 7. Fire 8 NN.MC3 3382 17.5 / 30 8. Koivisto 7.13 3302 15.5 / 30 9. Slowchess 2.83 3347 14.5 / 30 10.