Chess Engines Diary

Yakka 1.0 -  UCI chess engine. Author: CJDalrymple Rating Chess Engines Diary CEDR=2894 Yakka is a Chess Engine writen in object pascal (Delphi) that implements the Universal Chess Interface (UCI) protocol. It is recommended to use a Chess GUI application such as Arena, Banksia GUI Cute Chess. This project is licenced under the MIT Licence Future Endevours (TODO) In no particular order:   - Much experimenting / tweaking   - MultiPV   - Pondering      - Singular Extensions   - Endgame Tablebases   - NNUE v.1.1: 15 Sept 2024 release. Multiple bug fixes, improved time management, improved passed pawn evaluation, added singular extensions and late move pruning. You can download the precompiled Windows executable: 'Yakka v1.1 x64.exe' This will run on x86-64 CPU's which support the BMI2 instruction set. Yakka 1.1 download  

Middle class - another tournament. The Dragon 3.3 engine won, which is weak among the strongest chess engines, but here it was the best. In 2nd place Obsidian 13.0 and in 3rd-4th place Berserk 13 and PlentyChess 3.0.0 engines. GPU NVIDIA  RTX 3060 ti. GUI-Banksia, For Every Engine only 1 CPU and 512 Hashtables, Book - 4 GM mvs book,  6TBs. 🕒🕒Time 3'+3"   1026 (!) tournaments games download   💾 All games CEDR  429.636 games download  01.09.2024   @chessenginesdiary P Engine Score (Tie) +/-/= 1: Dragon 3.3 65.0 / 108 3443.00 (+22 -0 =86) 2: Obsidian 13.0 61.0 / 108 3247.75 (+17 -3 =88) 3: Berserk 13 60.0 / 108 3211.00 (+13 -1 =94) 4: PlentyChess 3.0.0 60.0 / 108 3193.00 (+15 -3 =90) 5: Alexandria 7.0.0 57.0 / 108 3048.75 (+8 -2 =98) 6: RubiChess

  HypnoS is a free and strong UCI chess engine derived from Stockfish  that analyzes chess positions and computes the optimal moves. HypnoS does not include a graphical user interface (GUI) that is required  to display a chessboard and to make it easy to input moves. These GUIs are  developed independently from HypnoS and are available online. HypnoS development is currently supported on the Openbench framework. OpenBench (created by Andrew Grant) is an open-source Sequential Probability Ratio Testing (SPRT) framework designed for self-play testing of engines. OpenBench makes use of distributed computing, allowing anyone to contribute CPU time to further the development of some of the world's most powerful engines. 🔝 Rating Chess Engines Diary CEDR=3780 HypnoS  20240727  - results: Caissa 1.20 9/16 +2 16 Partii Stockfish 20240723 5/10 +0 10 Partii Deep SOLIDOR AI 3/6 +0 6 Partii CorChess 20240724 3/6 +0 6 Partii Stockfish 16.1 3/6 +0 6 Partii Lc0 0.31.0 3/4 +2 4 Partii Kookaburr

We have another test tournament for the most powerful chess engines. At the top of the table are three engines with the same number of points: Stockfish 17 SE, Fidelio 17 MPV and SF-PRO 09.09.2024 . The new version of the Clover 8.0.1 chess engine did quite well. More test tournament results coming soon, check our website. Jurek Chess Engines Diary Team All CEDR games  429.636 download     💾  264 games from the tournament download @chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3"  💻Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB 🖬 GUI-Banksia Tech table: Engine KN/mov NPS dep/mov time/mov mov/game time/game fails Clover 8.0.1 23819 4861927 53.8 4.9 87.6 429.3 Fidelio 17 11238 2094880 42.6 5.4 69.0 370.0 Fidelio 17 MPV 12355 2266506 43.5 5.5 66.8 364.2 HypnoS 220824 11627 2195369 49.5 5.3 72.7 384.8 Rems Sep24 11057 2109395 45.3 5.2 69.7 365.5 SF PB 100924 11263 2103485 51.6 5.4 70.3 376.4 SF-PRO 09.09.2024 14015 2645735 44.7 5.3 74.4 394.0

  Sapling , a  strong dotnet UCI Chess engine [BETA].  Author: Tim Jones Sapling is still in active development so expect certain features to be missing or experimental. Also the current release is using a NNUE net trained from self play starting with random weights and is only 13 iterations deep, expect the engine to be much stronger in the coming days as the training does takes a while. Requirements - Sapling makes use of hardware intrinsics to improve performance. Currently your CPU must support: `Avx2`, `Bmi1`, `Bmi2`, `Popcnt`, `Sse`. Most modern hardware shipped after 2013 should be supported. - The releases come with a bundled version of the dotnet runtime, however if you want to run from source you'll need the dotnet 8 SDK installed. Sapling 1.0.0 download Sapling 1.0.0 for MacOs download

This is a specific tournament of strong chess engines. We have added earlier versions of the Stockfish engine for comparison. 1st place was taken by the Stockfish 20240820 Ivec engine. 2nd place was taken by the Stockfish 17 engine and 3rd place by the Stockfish 17 SE engine. More engine tests coming soon, check our website. Jurek Chess Engines Diary Team All CEDR games  429.636 download     💾  396 games from the tournament download @chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3"  💻Dell G15 SE, i7-11800H RAM 16,0 GB 🖬 GUI-Fritz 17 P Engine Score (Tie) +/-/= 1: Stockfish 20240820 Ivec 38.0 / 66 1211.75 (+10 -0 =56) 2: Stockfish 17 37.5 / 66 1197.00 (+9 -0 =57) 3: Stockfish 17 SE 37.0 / 66 1185.25 (+8 -0 =58) 4: Stockfish 16 36.0 / 66 1157.75 (+6 -0 =60) 5: CorChess 20240823 35.5 / 66 1148.50

Roc2  -  C++ chess engine derived from Gull 3  Author: Tom Hyer   Rating Chess Engines Diary CEDR=3265 v.2.0.3: Time management and hash improvements. Individual statistics: Roc 2022Aug18 Opponent Score +- Games Mantissa 3.7.2 4.5/12 -3 12 Games Velvet 4.1.0 4.5/12 -3 12 Games Dumb 1.11 10/10 +10 10 Games Devre 4.0 3.5/10 -3 10 Games Seawall 20220818 8/8 +8 8 Games Andscacs 0.95092 5/8 +2 8 Games DanaSah 9.0 5/8 +2 8 Games Toga IV 4/8 +0 8 Games Tornado Dec 9 2020 3.5/8 -1 8 Games Wasp 6.00 2.5/8 -3 8 Games Caissa 0.9.0 3.5/7 +0 7 Games Gogobello 3.0 3.5/6 +1 6 Games Weiss 2.1 3.5/6 +1 6 Games Stash 34.0 3.5/6 +1 6 Games Laser 1.7 3/6 +0 6 Games Zahak 10.0 2.5/6 -1 6 Games Defenchess 2.3 2/6 -2 6 Games Counter 5.0 2/6 -2 6 Games Flaming Titz 230822 0.5/6 -5 6 Games Viridithas 2.5.0 4/4 +4 4 Games Viridithas 2.6.0 4/4 +4 4 Games Roc2 2.0.3 download

Nectar - UCI chess engine Author: Dragjon The engine was created recently and has not played enough games yet to be on the CEDR ranking list. Tests of this version soon. v 0.1.7: Changed train epoch 50 to 70 Score of NectarV0.1.7 vs NectarV0.1.6: 713 - 605 - 269  [0.534] 1587 ...      NectarV0.1.7 playing White: 359 - 308 - 127  [0.532] 794 ...      NectarV0.1.7 playing Black: 354 - 297 - 142  [0.536] 793 ...      White vs Black: 656 - 662 - 269  [0.498] 1587 Elo difference: 23.7 +/- 15.6, LOS: 99.9 %, DrawRatio: 17.0 % SPRT: llr 2.95 (100.3%), lbound -2.94, ubound 2.94 - H1 was accepted Sequential NN model ------------------------------- Hidden layers : 16 Batch size    : 16384 Learning rate : 0.001 Loss          : mean_squared_error Metric        : mae Random seed   : 42 Epochs        : 70 Nectar 0.1.7 NNUE download

Heimdall -  UCI chess engine written in Nim. Author: Mattia Giambirtone More info Heimdall is available on Lichess under its old name (Nimfish), feel free to challenge it! I try to keep the engine running on there always up to date with the changes on the master branch v.1.0: A lot of stuff happened since the release of Heimdall 0.4: a beta version of the engine is now even playing at TCEC! Exciting stuff. Today I'm glad to be releasing the first NNUE version of Heimdall, trained with self-play data. More information about the training process and the data used can be found in the README. What changed A fuckton, actually: Of course, HCE is gone and has been replaced by NNUE. Top 20 here I come! Pretty output support (thanks to @tsoj's patch) Added MoveOverhead option Significant refactoring of search limit handling (compound limits are now supported) History LMR Fix a bazillion bugs with datagen and add win/draw adjudication Make isPV a static bool so that PV branches are spec

  StoneChess - UCI chess engine Author: Thibor Raven   Rating Chess Engines Diary CEDR=2349 StoneChess 2023-06-23 - results: Opponent Score +- Games Albatros 1.0.0 4/12 -4 12 Games Popochin 4.3 1.5/9 -6 9 Games Halcyon 1 2.5/7 -2 7 Games Anka 0.6.3 0.5/7 -6 7 Games Fornax 4.0 0.5/6 -5 6 Games Wahoo 1.0.0 5/5 +5 5 Games FrankyGo 1.0.3 4/5 +3 5 Games Kobol 1.0 3/5 +1 5 Games Zangdar 2.17.09 0/5 -5 5 Games Viridithas 10.0.0 0/5 -5 5 Games Superultra 1.0 0/5 -5 5 Games 4ku 3.1 0/5 -5 5 Games Freda 0.99 4/4 +4 4 Games Jinx 1.0 3/4 +2 4 Games Adachess 4.0 3/4 +2 4 Games Kheprichess 4.0.1 2.5/4 +1 4 Games Horowitz 2.2 2.5/4 +1 4 Games Mayhem 8.2 1.5/4 -1 4 Games Axon 0.3 1.5/4 -1 4 Games Camel 1.5.1 1.5/4 -1 4 Games Dragonrose 0.25 1.5/4 -1 4 Games StoneChess 2024-09-13 download

From time to time we will test new and amateur chess engines. In this tournament the best was the Integral v4 engine with a good result of 52 points out of 54 games. All CEDR games  429.636 download     💾  270 games from the tournament download @chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3"  💻Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB 🖬 GUI-Arena Pl Engine Rating Score S-B 01 Integral v4 2400 52.0/54  1242,00  02 4ku 5.1 3086 42.0/54  890,25  03 Rengar 2.0.0 2657 35.0/54  699,00  04 Cwtch 1 2400 30.5/54  600,00  05 Knightx 4.11 2823 29.5/54  521,50  06 Schoenemann 0.2.0 2400 29.0/54  534,00  07 CT800 1.46 2824 24.5/54  411,75  08 Tcheran 3.0 2242 14.0/54  177,25  09 Oxidation 0.7.2 2076 13.5/54  191,25  10 Radiance 3.3 2400 0.0/54  0,00 

Dear chess engine enthusiasts and friends of Chess Engines Diary, This is another portion of the big pack of chess engines. Check the download page regularly - we will improve it and add links. Please share your comments in the comment section. Jurek Chess Engines Pack (Windows) C-1 C-2 C-3 C-4 C-5 C-6 C-7 C-8 C-9 C-10 C-11 C-12 C-13 C-14 C-15 C-16 C-17 C-18 C-19 C-20 C-21 ?-1 ?-1 ?-1 Dear Users, we are planning to buy a 1TB disk in the cloud. After we collect the right amount, we will put files there instead of on the catfile and downloading will be easier. The easiest way to support us is on PayPal:

Stockfish 17 -  UCI chess engine Roy Sawyer: With Stockfish 15, the developers stopped providing engines for Windows 32-bit, despite the fact that there is still support to do this in the source code. As an owner of one of these old machines, I decided to build the engines myself. Although I have finally upgraded to a 64-bit computer earlier this year, I thought I would build Stockfish 17 32-bit engines for anyone who is still holding on to their old 32-bit computer. Stockfish 17 32 bit download

  Rems - chess engine UCI by Solista Rating Chess Engines Diary CEDR=3758 Solista: (Eduard Nemeth) :  Small update to my Rems engine. For me, it's the ultimate tool for analyzing practical positions. For chess puzzles, I recommend special checkmate solvers or the Crystal engine. Rems has an ultra-fast yet accurate search. If you have a fast computer with more than 8 cores, you should use the multi-variant mode. For intensive analysis of openings and middle games, I use 2 variants. But only one in the endgame. Features: External networks, minimum thinking time, slow mover. Version with Random Op. MultiPV mode. Rems MPV Sep24 download