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This is prehistory πŸ™‚ 11 years ago: Scorpio 202 wins 3 League T04, 20.11.2009

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This is prehistory πŸ™‚ 11 years ago: 3 League T04, 20.11.2009 GUI-Arena Time: 1',  Windows x32, Intel Celeron D.

CorChess 111021 wins CEDR - New Engines Tournament 2021.10.14-21

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   Time 15'+10" HP, Intel Core i5-8250U  with 8 GB RAM GUI  Fritz 17 Book  Perfect 2021 CEDR  2.278 games 01.10.2021 Table:  Scid vs PC CEDR Test Tournament:   240 games

This is prehistory πŸ™‚ 11 years ago: Rybka 3 wins 2 League T04, 18.11.2009

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  This is prehistory πŸ™‚ 11 years ago: 2 League T04, 18.11.2009 GUI-Arena Time: 1',  Windows x32, Intel Celeron D.

Chess Engines Tournaments (games and table) - 01-09.2021

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Chess Engines Tournaments (games and table). Time 3'+3": 1-9.2021 download

CEDR - Banksia Tournament, 16-20.10.2021

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  Time 15'+10" HP Pavilion, i5-1035G1, 8GB RAM GUI  Banksia Book  Perfect 2021 CEDR 2.278 games 01.10.2021 Table:  Scid vs PC CEDR Test Tournament:   380 games Hopper (20) and Counter (17) - lots of bugs while playing !  Tech (average nodes, depths, time/m per move, others per game), counted for computing moves only, ignored moves with zero nodes: # name nodes/m NPS depth/m time/m moves time #fails.

Chess engine: Stockfish 21101922

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Stockfish - UCI chess engine, compiled by bmc4 Rating CEDR=3314 (2 place) Timestamp: 1634674479 Adjust TTdepth acceptance on early cutoff STC: LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 63784 W: 16185 L: 15917 D: 31682 Elo +1.46 Ptnml(0-2): 231, 7309, 16531, 7603, 218 https://tests.stockfishchess.org/tests/view/616ed03a942d40685e3237c0 LTC: LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 12728 W: 3268 L: 3072 D: 6388 Elo +5.35 Ptnml(0-2): 8, 1298, 3563, 1480, 15 https://tests.stockfishchess.org/tests/view/616ef156942d40685e32380a bench: 7050445 Stockfish 21101922 NNUE download  

This is prehistory πŸ™‚ 11 years ago: Ippolit wins 1 League T04, 16.11.2009

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  This is prehistory πŸ™‚ 11 years ago: 1 League T04 , 16.11.2009 GUI-Arena Time: 1',  Windows x32, Intel Celeron D.

Chess engine: Stockfish Polyglot 161021

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Stockfish Polyglot  by Massimiliano Goi. Stockfish Polyglot is the same Stockfish with the ability to read Polyglot books (.bin format). This chess engine can read up to four Polyglot books. This new version works with the NNUE neural networks. Rating CEDR=3314 Stockfish Polyglot 161021 - download

Chess engine: CorChess 2021-10-17 and NNUE

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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=3292 CorChess 2021-10-17 NNUE - download

Chess engine: Stockfish 2021-10-17 Ivec

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Stockfish - UCI chess engine, compiled by Ivec Rating CEDR=3314 Stockfish 2021-10-17 Ivec NNUE download

Chess engine: Lynx 0.6.0 (Windows, Mac, Linux)

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Lynx it's written in C# (.NET 6). UCI protocol is needed. Chess Engines Diary Rating=2428 v.0.6.0 Implement Zobrist hashing  Stop IDDFS search when unlikely to reach next depth level  Increase DepthWhenLessThanMinMoveTime  Make positionHistory dictionary update more efficient II Add inline suggestions for the compiler  Dictionary replacement with an Array  Bugfix: Use Position.MoveTime when provided, rather than the default Depth  Micro-optimizations in MoveGenerator  πŸ‘· Bump .NET sdk version to 6 rc2  --- Lynx 0.6.0 download

Chess engine: Berserk 6.0 NNUE

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Berserk - UCI chess engine (  written in C). Author:  Jay Honnold  Rating JCER=3031 (16 place) v.6.0 This is the first release of Berserk with a NNUE evaluation. The net was trained using a custom trainer from 350 million FENs from Berserk 5 self play games. Berserk currently uses a network arch that does not have compatibility with other engines. The network is embedded into the binary. There is no option to disable it or attach another network. This will most likely change in the future. Berserk 6.0 download

Chess engine: Velvet 3.0.0

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Velvet - UCI Chess Engine Author: Martin Hornet, Rating CEDR (Chess Engines Diary Rating)=3035 It is based upon my previous web-based engine Wasabi, which can be played here. Installation x86_64-modern - recommended for recent CPUs from 2013 onwards (requires a CPU with support for the BMI1 instruction sets) x86_64-popcnt - for older 64-Bit CPUs, which support the POPCNT instruction, but not BMI1 x86_64-vintage - for older 64-Bit CPUs, which support neither POPCNT nor BMI1 v.3.0.0 Added multi-threaded search Added new neural network trained using self-play positions and evaluations from Velvet 2.0.0 Reduced neural network size by half: removed color-specific input features Improved training set generation by increasing the position variety Optimized neural network evaluation Replaced null move reduction with null move pruning Tuned and improved search Velvet 3.0.0 download

Chess engine: Colossus 2021b

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Colossus - UCI chess engine, Author: Martin Bryant Rating CEDR=2739 v. 2021b Supports Chess960/FRC 'Ponder' now works again Time control improvements Tranposition table enhancement Evaluation function improvements (knowledge and efficiency) Colossus 2021b download

Stockfish 111021_Ivec wins CEDR - Acer Arena Tournament (for older hardware), 2021.10.13-18

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  Time 15'+10" Acer, i3-3217U @ 1.80GHz with 3,9 GB  GUI  Arena 3.5.1 Book  Perfect 2021 CEDR 2.278 games 01.10.2021 Table:  Scid vs PC CEDR Test Tournament:   182 games

This is prehistory πŸ™‚ 11 years ago: Robbolito 0.95 wins Super Eliminations T03, 15.11.2009

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This is prehistory πŸ™‚ 11 years ago:  Super Eliminations T03, 15.11.2009 GUI-Arena Time: 1',  Windows x32, Intel Celeron D.

Chess engine: Hopper Engine 1.2

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Hopper Engine  - UCI chess engine Author: Jonathan McDermid  v.1.2 Largest changes since v1.0 are functioning pawn hash tables, a more sophisticated evaluation function, and time control. The engine should be stronger than it currently is with the features that are already implemented, so future versions will likely contain less new features and more refined versions of current ones. Current Features: negamax algorithm forsyth–edwards notation material evaluation mobility evaluation alpha-beta pruning iterative deepening principle variations transposition tables pawn hash table zobrist keys null moves zugswang detection quiescent search dynamic aspiration windows pinned piece detection double check detection threatened squares killer moves perft principal variation search static exchange evaluation Hopper Engine 1.2 download

This is prehistory πŸ™‚ 11 years ago: Chronos 1.9.7 wins League Qualifiers T03, 11.11.2009

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  This is prehistory πŸ™‚ 11 years ago:  League Qualifiers T03, 11.11.2009 GUI-Arena Time: 1',  Windows x32, Intel Celeron D.

Supernova 2.4 wins CEDR - Amateur League group E4 edition 01, 2021.10.10 - 2021.10.17

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  CEDR=Chess Engines Diary Rating Amateur League E4 edition 01: Supernova 2.4 and  MinimalChess 0.6  promote to group E3 (Amateur League) RusticAlpha 3.0.0 and  Kouri 1.15  relegate to group E5 ( Amateur League) Time 15'+10" Lenovo Z710 i7-4710MG, 8GB RAM GUI  Fritz 15 Book  Perfect 2021 CEDR 2.278 games 01.10.2021 Table:  Scid vs PC CEDR League Tournament:   240games Amateur and new engines E1 Edition 01 – temp 15’+10” Rating Score note 1 GreKo 2020.08 NNUE 3065 22.0 / 30 promotion 2 Amoeba 3.3 3127 21.5 / 30 promotion 3 Bit-Genie 9 3105 21.0 / 30 4 Fabchess 1.16 3131 19.0 / 30 5 Francesca 0.30a 3125 18.5 / 30 6 Baron 3.44.1 3108 17.5 / 30 7

Chess engine: Stockfish 21101514 (Windows and Linux)

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Stockfish - UCI chess engine, compiled by Stefano Cardanobile Rating CEDR=3314 (2 place) Timestamp: 1634302621 Smooth improving Smooth dependency on improvement margin in null move search. STC LLR: 2.93 (-2.94,2.94) <-0.50,2.50> Total: 17384 W: 4468 L: 4272 D: 8644 Elo +3.92 Ptnml(0-2): 42, 1919, 4592, 2079, 60 https://tests.stockfishchess.org/tests/view/61689b8a1e5f6627cc1c0fdc LTC LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 45648 W: 11525 L: 11243 D: 22880 Elo +2.15 Ptnml(0-2): 26, 4731, 13036, 4997, 34 https://tests.stockfishchess.org/tests/view/6168a12c1e5f6627cc1c0fe3 It would be interesting to test if the other pruning/reduction heuristics in master which are using the improving variable (ie the sign of improvement) could benefit from a smooth function of the improvement value (or maybe a Relu of the improvement value). Bench: 4916775 Stockfish 21101514 NNUE download Stockfish  21101514   for Linux  

4 League CEDR Edition 01, 2021.10.07 - 2021.10.14

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Coiled 0.8  promote to 3 League (TOP 64) Topple 0.8.1  relegate to group E1 (Amateur League) Time 15'+10" HP ENVY i-5  i5-8250U, 8GB RAM GUI  Arena 3.5.1 Book  Perfect 2021 CEDR 2.278 games 01.10.2021 Table created  Scid vs PC CEDR League Tournament:   210games League – TOP 64 1 League Edition 01 – temp 15’+10” Rating Score note 1. Fisherov 0.98e 3534 22.5 / 30 2. Raubfisch X47b 3473 21.5 / 30 3. SugaR Al 2.40 3483 20.0 / 30 4. Stockfish 14 3517 20.0 / 30 5. Dragon 2 3482 18.0 / 30 6. Ethereal 12.75 NNUE 3479 16.5 / 30 7. Fire 8 NN.MC3 3421 16.0 / 30 8. Igel 3.0.5 3400 15.0 / 30 9. Slowchess 2.7