Chess Engines Diary

This is prehistory 🙂 10 years ago: Playoff CEDR, 2011.01.02 Time: 3', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory  Microsoft Windows XP Home Edition x32 GUI: Arena 3.0

  CEDR=Chess Engines Diary Rating Amateur League E1 edition 02 FabChess 1.16 and  Velvet 3.1.0  promote to 4 League (TOP 64) Delocto 0.61n and  Dumb 1.8 relegate to E2 Amateur League Time 15'+10" Intel Core i7 7,9 GB GUI  Arena 3.5.1 Book  Perfect 2021 CEDR 9.278 games 27.11.2021 Table created  Scid vs PC CEDR Test Tournament:   210 games

Chai - UCI chess engine Author: Jakhac v.2.6.6. In this version, a stronger version of chai is released. The most notable changes are multi-threading support and the implementation of a tool for endgame-tablebase probing (Fathom). Further, new features include Aspiration Windows and a time-management algorithm. For testing and custom builds, note that number of threads and size of the hashtable can be set via Makefile parameters. For reference, see the Installation section in the readme. Chai 2.6.6 download

MrBob - UCI chess engine (made using C++)  Author: Vincent Yu  Rating JCER=2753   MrBob 1.1.0 download

BLANK is a UCI (java) chess engine. Author:  Ryan Lau This engine was written from scratch based off Object-Oriented design using Java. The basic UCI (Universal Chess Interface) protocol has been implemented for communication with UCI-compatible GUIs. It also has an in-built GUI to directly interact with the engine. To install BLANK Chess as a UCI engine on Arena Chess GUI: From the Arena GUI MenuBar, Select Engines > Install New Engine Select .jar file type and navigate to location of the saved binary file. Select the binary file and choose UCI protocol. Go to the MenuBar, Select Engines > Manage... > Details and Select BLANK Chess Engine Under General, Click on the Type drop-down list > select UCI. Apply changes. Enjoy the engine! v.1.3.0 Improved search tree pruning Extended Futility Pruning Static Null Move Pruning Implemented 50-Move rule and insufficient material draw logic Adopted a more aggressive null-move pruning approach by increasing reduction constant at h...

FoxSEE - UCI chess engine, Rating CEDR=2827 (57 place) Author: Zixiao Han  v.7.32 Removed penalty for unprotected pieces Fixed logical bug in complete SEE implementation FoxSEE 7.32 download

Lynx it's written in C# (.NET 6). UCI protocol is needed. Chess Engines Diary Rating=2529 v.0.9  Implement Aspiration Windows (#121) 🔍 Reuse PV when 'ponder hit' (#127) ⚙ Increase max. depth to 64 (#122) ⚡ Remove branch from hot path (#120) 🐛 Fix bug Utils.InCheck(), which was causing a relevant performance hit (#117) 🐛 Fix crash when depth reaches MaxDepth (#118) 🐛 Fix incremental hashing bug in null-moves (#124) --- Lynx 0.9 download

Stockfish - UCI chess engine, compiled by Joost VandeVondele Rating CEDR=3375 (1 place) Timestamp: 1638186961 Update default net to nn-4f56ecfca5b7.nnue New net trained with nnue-pytorch, started from a master net on a data set of Leela (T60.binpack+T74.binpck) Stockfish data (wrongIsRight_nodes5000pv2.binpack), and Michael Babigian's conversion of T60 Leela data (including TB7 rescoring) (farseer.binpack) available as a single interleaved binpack: https://drive.google.com/file/d/1_sQoWBl31WAxNXma2v45004CIVltytP8/view?usp=sharing The nnue-pytorch branch used is https://github.com/vondele/nnue-pytorch/tree/wdl passed STC: https://tests.stockfishchess.org/tests/view/61a3cc729f0c43dae1c71f1b LLR: 2.95 (-2.94,2.94) <0.00,2.50> Total: 49152 W: 12842 L: 12544 D: 23766 Elo +2.11 Ptnml(0-2): 154, 5542, 12904, 5804, 172 passed LTC: https://tests.stockfishchess.org/tests/view/61a43c6260afd064f2d724f1 LLR: 2.96 (-2.94,2.94) <0.50,3.00> Total: 25528 W: 6676 L: 6425 D: 12427 Elo...

  Time 15'+10" Lenovo Ideapad 330 i3-8130U 12GB RAM GUI  Banksia Book  Perfect 2021 CEDR 9.278 games 27.11.2021 Table: Banksia CEDR Test Tournament:   132 games 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. Engine KN/move NPS depths/move time/move moves/game time/game fails Blunder 7.1.0 6924 419157 15.9 16.5 62.6 1034.6 Clover 2.4 24949 1264290 38.7 19.7 78.4 1547.3 Dark Toga 1.1 18414 1012522 27.5 18.2 89.2 1622.7 Koivisto 7.0 10830 708587 33.6 15.3 71.4 1090.7 Komodo 12.1.1 23963 1400275 31.2 17.1 68.8 1176.9 MadChess 3.0 51694 2257467 20.4 22.9 62.7 1436.4 MinimalChess 0.6 9540 487710 18.2 19.6 69.5 1360.4 ShashChess 19.2 12625 690244 46.2 18.3 68.8 1258.7 SlowChess Blitz 2.7 11899 625417 2...

This is prehistory 🙂 10 years ago:   Eliminations CEDR, 2011.01.16   Time: 3', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory  Microsoft Windows XP Home Edition x32 GUI: Arena 3.0

Top 7 Best Chess Engines in the World in 2021 Results after 26 games,  Time: 60' + 30", GUI-Fritz 17, 4 rounds

Raubfisch is an engine derived from Stockfish and Torpedo 1.1 XJR (private engine by Frank Karl Werner and Max Fehler).  Rating CEDR - 3307 (4st place) *********************************************************************************************** Warning : The network is not embedded, you must add the NNUE network with the engine in the same file. Otherwise, the engine will not work! *********************************************************************************************** Raubfisch X47e1 and GTZ26e1 NNUE - download

  Time 15'+10" HP Pavilion i5-1035G1 8GB RAM GUI: Fritz 17 Book  Perfect 2021 CEDR 9.278 games 27.11.2021 Table:  Scid vs PC CEDR Test Tournament:   56 games

  This is prehistory 🙂 10 years ago: Eliminations CEDR, 2011.01.16   Time: 2', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory  Microsoft Windows XP Home Edition x32 GUI: Arena 3.0

This is prehistory 🙂 10 years ago: Exam - Chess Engines Diary, 2011.01.15-16   Time: 2', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory  Microsoft Windows XP Home Edition x32 GUI: Arena 3.0

Eubos - a  basic Java chess engine, written for kicks. Uses jcpi for the UCI protocol parts. Kind of weak, doesn't evaluate for king safety, for example. Now uses transpostion hashing, but because it runs in the Java VM on a bog standard PC, doesn't search very deeply (around 100K Nodes/s, though this is actually quite hard to evaluate due to the hashing).  Author: Chris Bolt  Rating CEDR= 2385 v.2.3 Added Aspiration Windows to the search algorithm. Otherwise minor optimisations and refactoring. You must have installed Java version 8 on the PC to use Eubos (get it from java.com) To install Eubos as an engine in Arena: 1. Select Engines > Install New Engine 2. In the file browser dialog that appears, change the drop down to *.bat 3. Navigate to the Eubos binary location, select the Eubos.bat 4. Select UCI protocol to communicate with Eubos 5. That's it!  Eubos 2.3 download

Odonata - UCI chess engine Rating CEDR=2805  Author: Andy Watkins   v.0.5.1: Elo improved by 200+ in self-play vs release 0.4.0 (expected Elo 2500+) Late move reductions, razoring, check extensions, time control tuning Greatly simplified UCI options Rook behind passer eval adjustment Phase adjusted logistic k-steepness incorporated into texel-style tuning Some items built but not tuned, finished or adding Elo yet. Notably Aspiration searches (Alternate/direct addressed) bucket hashing and aligned hash MultiPV (experimental) TOML configuration/profile files Tri-valued evaluation weights Odonata 0.5.1 download

Mayhem - UCI chess engine , Author:  Toni Helminen Rating CEDR=2959 (46 place) v.6.3 Some cleanups and fixes Level works now. Level=30 ~Fruit 2.1 Mayhem 6.3 download

Stockfish - UCI chess engine, compiled by Michael Chaly Rating CEDR=3375 (1 place) Timestamp: 1638105906 Refine futility pruning for parent nodes This patch is a result of refining of tuning vondele did after new net passed and some hand-made values adjustements - excluding changes in other pruning heuristics and rounding value of history divisor to the nearest power of 2. With this patch futility pruning becomes more aggressive and history influence on it is doubled again. passed STC https://tests.stockfishchess.org/tests/view/61a2c4c1a26505c2278c150d LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 33848 W: 8841 L: 8574 D: 16433 Elo +2.74 💪 Ptnml(0-2): 100, 3745, 8988, 3970, 121 passed LTC https://tests.stockfishchess.org/tests/view/61a327ffa26505c2278c26d9 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 22272 W: 5856 L: 5614 D: 10802 Elo +3.78 💪 Ptnml(0-2): 12, 2230, 6412, 2468, 14 bench 6302543 Stockfish 21112814 NNUE download Stockfish 21112814 for Linux download  

Top 7 Best Chess Engines in the World in 2021 Results after 12 games,  Time: 60' + 30", GUI-Fritz 17, 4 rounds

  Time 15'+10" Acer i3-3217U with 3,9 GB Memory GUI  Arena 3.5.1 Book  Perfect 2021 CEDR 9.278 games 27.11.2021 Table:  Scid vs PC CEDR Test Tournament:   90games

This is prehistory 🙂 10 years ago: Amateur Engines Tournament, 16.01.2011 Time: 1', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory Microsoft Windows XP Home Edition x32 GUI: Arena 3.0

Time: 1'   240 games download , GUI - Chess Tournament, Tablet - Smasung Galaxy TAB S6 Lite, 4GB RAM, all  8.855 games  

Stockfish - UCI chess engine, compiled by Michael Chaly Rating CEDR=3375 (1 place) Timestamp: 1638020866 Adjust usage of history in futility pruning This patch refines 0ac8aca893dd2052f8433e0b4a3d65073266b00f that uses history heuristics in futility pruning. Now it adds main history of the move to in and also increases effect by factor of 2. passed STC https://tests.stockfishchess.org/tests/view/61a156829e83391467a2b2c9 LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 68464 W: 17920 L: 17587 D: 32957 Elo +1.69 Ptnml(0-2): 239, 7711, 18025, 7992, 265 passed LTC https://tests.stockfishchess.org/tests/view/61a1bde99e83391467a2b305 LLR: 2.95 (-2.94,2.94) <0.50,3.00> Total: 26088 W: 6926 L: 6674 D: 12488 Elo +3.36 💪 Ptnml(0-2): 18, 2619, 7531, 2845, 31 bench 6804653 Stockfish 21112714 NNUE download Stockfish 21112714 for Linux download  

Revenge (commercial successor of Pedone 3.1). Rating TCEC - 3460 Homepage

  Time 15'+10" HP ENVY i-5  i5-8250U 8GB RAM GUI  Fritz 17 Book  Perfect 2021 CEDR 9.278 games 27.11.2021 Table:  Scid vs PC CEDR Test Tournament:   90games

Protej - UCI chess engine,  Author - Alex Brunetti v.0.6.0: Massive line by line code cleaning and optimization; no more crashes or stalls. Time control highly improved, no more time losses. Move generator improved with magic bitboards for sliders; perft is now very fast. Search improved, better history management, thinking output highly improved. Better evaluation. Console mode: adjusted codepage to work in more systems; better graphics, big board and figurines always enabled; new commands (bench, eval, kiwi, unmake) and integration with UCI commands; perft suite and test suite now run in an automated way. UCI mode: added go nodes, removed ponder management, go infinite may be invoked with just go. WinBoard mode: added memory, undo and ? (move now) commands. Protej 0.6 download

Raubfisch is an engine derived from Stockfish and Torpedo 1.1 XJR (private engine by Frank Karl Werner and Max Fehler).  Rating CEDR - 3307 (4st place) *********************************************************************************************** Warning : The network is not embedded, you must add the NNUE network with the engine in the same file. Otherwise, the engine will not work! *********************************************************************************************** Raubfisch X47e and GTZ26e NNUE - download

Top 7 Best Chess Engines in the World in 2021 Time: 60' + 30", GUI-Fritz 17, 4 rounds Lp. Engine CEDR Author 1 CorChess 061121 3351 compiles by Ivec 2 Stockfish 251121 3340 compiled by Michael Chaly 3 Fisherov 0,98h 3317 Luis Damián Primo and Andres Ivan Primo 4 Dragon 2.5.1 3315 Larry Kaufman 5 Raubfisch X47e 3307 Frank Karl Werner and Max Fehler 6 Eman 7.70 3288 Khalid Omar 7 Sugar 2.50 3283 Marco Zerbinati

This is prehistory 🙂 10 years ago: 5 League Chess Engines Diary, 13-14.01.2011 Time: 1', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory Microsoft Windows XP Home Edition x32 GUI: Arena 3.0

  Chess Engines Diary Rating CEDR 27.11.2021 9.278 games download ,  ELOStat, Rp=3000 Time: 15’+10”

Swordfish has a reasonable balance between strength and tactical abilities. It still has solid style of playing and achieves good results in test suites. It can be useful for analyzing sharp positions where regular Stockfish can overlook some tactics. Added support for polyglot Swordfish 14.5 download

Blue Marlin 14.5 NNUE - download We have stopped posting files on Shortest. Currently, you can find the current links on the DOWNLOAD page. Most of them are placed on Katfile servers. If you do not want to wait long with the download, you can support our work and become a donor. As a thank you, we provide you with a link to the MEGA drive, where you can download the engines and other files without waiting. More information can be found on the DONORS page.

ShashChess - UCI chess engine. Rating CEDR=3297 v.20.1: Fix learning ShashChess 20.1 - download ShashChess 20.1 for Linux - download

BrainLearn - UCI chess engine Rating CEDR=3271 v.15.1: Fix learning BrainLearn 15.1 - download BrainLearn 15.1 for Linux - download

Odonata - UCI chess engine Rating CEDR=2834  Author: Andy Watkins   v.0.5.0: Elo improved by 200+ in self-play vs release 0.4.0 (expected 2500+) Late move reductions, razoring, check extensions, time control tuning Greatly simplified UCI options Rook behind passer eval adjustment Phase adjusted logistic k-steepness incorporated into texel-style tuning Some items built but not tuned, finished or adding Elo yet. Notably Aspiration searches (Alternate/direct addressed) bucket hashing and aligned hash MultiPV (experimental) TOML configuration/profile files Tri-valued evaluation weights Odonata 0.5.0 download

Coiled  - UCI chess engine, Author - Oscar Gavira  Rating CEDR=3169 (16 place) Coiled 1.2 download

Stockfish - UCI chess engine, compiled by Michael Chaly Rating CEDR=3375 (1 place) Timestamp: 1637865483 Use fraction of history heuristics in futility pruning This idea is somewhat of a respin of smth we had in futility pruning and that was simplified away - dependence of it not only on static evaluation of position but also on move history heuristics. Instead of aborting it when they are high there we use fraction of their sum to adjust static eval pruning criteria. passed STC https://tests.stockfishchess.org/tests/view/619bd438c0a4ea18ba95a27d LLR: 2.93 (-2.94,2.94) <0.00,2.50> Total: 113704 W: 29284 L: 28870 D: 55550 Elo +1.27 Ptnml(0-2): 357, 12884, 30044, 13122, 445 passed LTC https://tests.stockfishchess.org/tests/view/619cb8f0c0a4ea18ba95a334 LLR: 2.96 (-2.94,2.94) <0.50,3.00> Total: 147136 W: 37307 L: 36770 D: 73059 Elo +1.27 Ptnml(0-2): 107, 15279, 42265, 15804, 113 bench 6777918 Stockfish 21112519 NNUE download Stockfish 21112519 for Linux download ...

Time: 1'   90 games download , GUI - Chess Tournament, Tablet - Smasung Galaxy TAB S6 Lite, 4GB RAM, all  8.855 games    

This is prehistory 🙂 10 years ago: 3 League Chess Engines Diary, 30-31.01.2011 Time: 3'+1", Intel Celeron D CPU 3.46GHz with 2,0 GB Memory Microsoft Windows XP Home Edition x32 GUI: Arena 3.0

v.0.9.0 post0 This version has been submitted to the TCEC Swiss 2 event. ClassicAra 0.9.7 has a higher GPU and CPU utilization thanks to a higher batch size and more threads GitHub page

  This is prehistory 🙂 10 years ago:  League qualifiers  2011.01.15 Time: 3', Intel Celeron D CPU 3.46GHz with 2,0 GB Memory Microsoft Windows XP Home Edition x32 GUI: Arena 3.0

  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=3229 (7 place) Koivisto 7.9 - download

Swordfish has a reasonable balance between strength and tactical abilities. It still has solid style of playing and achieves good results in test suites. It can be useful for analyzing sharp positions where regular Stockfish can overlook some tactics. Added support for polyglot Swordfish PB 14.4 download

  Zahak - UCI chess engine written in Go.  Author: Amanj Sherwany  Rating CEDR=2967 v.9.0 Usability improvements MultiPV Support Supporting go searchmoves ..., go mate ... and go nodes ... UCI go commands, which makes the engine better at finding mate and also in analyzing (searchmoves). Support of 7 different skill levels (1 being the weakest, while 7 is the strongest). Anchored around Rustic Alpha 3, I found that, based on CCRL the ratings will probably translate to the following: Skill Level 1: 1270 Skill Level 2: 1440 Skill Level 3: 1630 Skill Level 4: 1856 Skill Level 5: 2004 Skill Level 6: 2074 Strength improvements A much stronger network is included, trained on more than 500 million self-play positions. A much more improved search Better move ordering thanks to counter history and follow-up history Lots of bug fixes! Much better multi-threading support. Zahah 9.0 download

Walleye is a UCI-compatible engine written using the classical alpha-beta style AI. It supports loading board positions from arbitrary FEN strings, Unicode pretty printing to the console, and UCI communication logs to help with debugging. Originally this project was meant as a first introduction to rust and chess programming, but it got a bit carried away. Author: Mitchel Paulin  Rating CEDR=2590 v.1.5.2 Further reduced excess CPU usage Fixed a bug related to capturing en passant Some tweaks to the search, no major changes Added check extension Mate in X moves is now correctly reported in UCI rather than just a large negative or positive number Walleye 1.5.2 download