Chess Engines Diary

  Weiawaga - UCI chess engine. This is the first release since fully porting the engine to Rust, and so that is by far the biggest change. This release also includes multithreading for the first time via Lazy SMP, the introduction of Static Exchange Evaluation, a switch to Principal Variation Search, and a host of minor optimizations made possible by writing the engine in Rust rather than Java. Author: Heiaha v.5.0 This release introduces an evaluation function based on a NNUE-style architecture of input size 728, with 8 buckets of 256 hidden neurons which is chosen depending on the number of pieces left on the board. This network was trained on 125 million positions from self-play games using Weiawaga v4.0. The only new search change is the introduction of reverse futility pruning. The release also includes many minor optimizations, and is ~350 Elo stronger than Weiawaga v4.0. ************* Jim Ablett compile Weiawaga 5.0 JA download

  Chess-Rikus is an amateur, non-commercial chess-playing engine. It is compatible with Winboard and Xboard, and it can be used standalone with a text interface. It is written in C, and began as a student project in my data structures class at Boston College. Chess-Rikus is free to use, provided you ask my permission before setting it up to play on online game servers or in tournaments against other computer programs. ************* Jim Ablett compile Chess-Rikus 1.466 JA download

New versions of powerful chess engines played in the tournament. The engines that scored the most points were: Marauders 3.4 and Sun 12 . Among the engines that are not based on the Stockfish source code, the best results were Uralochka 3.41a and Clover 6.1.24 . All CEDR  333.448 games download  (01.05.2024 - 3'+3")  💾  342 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 +/-/= 1: Marauders 3.4 26.5 / 36 (+17 -0 =19) 2: Sun 12 26.5 / 36 (+17 -0 =19) 3: HypnoS 100524 26.0 / 36 (+16 -0 =20) 4: HypnoS 160524 25.5 / 36 (+16 -1 =19) 5: Sun 13 25.5 / 36 (+15 -0 =21) 6: Tactical Titan 25.5 / 36 (+15 -0 =21)

  Today start:  1 League Chess Engines Diary, edition 04/2024 Time: 3'+3"  GUI-Banksia League – strongest chess engines CEDR TOP 64 1 League Edition 04/2024 - 3’+3” Rating Score 1. SugaR Al SE 3727 2. Corchess 20240502 3770 3. ShashChess 35.3 3747 4. Lc0 BT4 3715 5. Stockfish 2024051807 3761 6. Dragon 3.3 3712 7. Berserk 13 3700 8. Obsidian 12 3698 9. RubiChess 20240112 3650 10. Chess-System-Tal-NNUE-2 3643 11. Rofchade 3.1 3620 12. Clover 6.1.24 JA 3645 13. Caissa 1.18 3680 14. Velvet 7.3.0 3581 15. Igel 3.5.5 3590 16. Dragon free 3615

SF-PB  Stockfish, a UCI chess playing engine derived from Glaurung 2.1   Copyright (C) 2004-2023 The Stockfish developers (see AUTHORS file) Stockfish is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This new version works with the NNUE neural networks. Rating Chess Engines Diary CEDR=3751 Individual statistics:  SF-PB 240424 Deep Blue 20240315-killer 3/4 +2 4 Games Ethereal 14.25 3/4 +2 4 Games Crystal 8 2.5/4 +1 4 Games Obsidian 12.0 2.5/4 +1 4 Games JigSaw 5.5i 2.5/4 +1 4 Games Dragon 3.3 2.5/4 +1 4 Games RubiChess 20240112 2.5/4 +1 4 Games Berserk 13 2.5/4 +1 4 Games PlentyChess 1.0.0 2.5/4 +1 4 Games Yuliirma 4.0 2/4 +0 4 Games Yuli GM Pro 16 2/4 +0 4 Games Brainlearn 28 2/4 +0 4 Games Marauders 3.3i 2/4 +0 4 Games AbbyStein 2.8 2/4 +0 4 Games Stockfish 16.1 2/4 +0 4 Games CorChess 20240426 2/4 +0 4 Ga

  Author: "To the users of my books: The new public books are versions of the books that, in private, served as sparring for me to prepare my competitive books. At this time I am not active in properly optimizing them, so although you are free to use them for whatever purpose you wish (except to clone them), my recommendation is that you do not use them to compete on sites like Playchess or Lichess. They have weak lines of play and are not updated." Pampa3 bin (May 2024) - download source: Biyuyachess.

Stockfish 2024051816  - UCI chess engine, compiled by  Muzhen Gaming Rating CEDR=3761 Stockfish 2024051816   Muzhen Gaming  (all versions) download Timestamp: 1716048585 VVLTC search tune Tuned with 85k games at VVLTC. VVLTC 1st sprt: https://tests.stockfishchess.org/tests/view/6648b836308cceea45533ad7 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 14880 W: 3890 L: 3652 D: 7338 Elo +5.56 Ptnml(0-2): 0, 1255, 4694, 1489, 2 VVLTC 2nd sprt: https://tests.stockfishchess.org/tests/view/6648c34f308cceea45533b4f LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 24984 W: 6502 L: 6235 D: 12247 Elo +3.71 Ptnml(0-2): 1, 2178, 7867, 2445, 1 closes https://github.com/official-stockfish/Stockfish/pull/5264 Bench: 1198142 Stockfish 20240210 - results: Stockfish 16.1 13.5/26 +1 26 Games Deep Blue 20240315-killer 13/26 +0 26 Games Yuliirma 4.0 13/26 +0 26 Games Raid 3.6 TR 13/26 +0 26 Games Yuli GM Pro 16 12.5/26 -1 26 Games JigSaw 5.5i 12.5/26 -1 26 Games Crystal 8 14/24 +4 24 Games Marauders 3.3i 13

  Chess engine: Arasan 24.2.2 NNUE Author: Jon Dart, Rating CEDR=2945 Arasan 24.2.2 for Android download BrainLearn 28.1 - UCI chess engine Rating CEDR=3505 BrainLearn 28.1 for Android download Chess engine: Camel 1.5.1 Author: Bruno Mendes,  Rating CEDR=???? Camel 1.5.1 for Android download Chess engine: Cheng 4.48 Rating CEDR=2722,  Author - Martin Sedlak   Cheng 4.48 for Android download Chess engine: CorChess 20240422 Author Ivan Ivec,  Rating CEDR=3531  CorChess 20240422 for Android download More about engines for Android can be found on the website: " Android "

Calvin Chess - java chess engine v.3.4.0: Calvin 3.4.0 is released and comes with an estimated ~43 ELO strength gain in self-play. Score of Calvin DEV vs Calvin: 713 - 437 - 1046  [0.563] 2196 ...      Calvin DEV playing White: 377 - 188 - 533  [0.586] 1098 ...      Calvin DEV playing Black: 336 - 249 - 513  [0.540] 1098 ...      White vs Black: 626 - 524 - 1046  [0.523] 2196 Elo difference: 43.9 +/- 10.5, LOS: 100.0 %, DrawRatio: 47.6 % Calvin 3.4.0 comes with the following new features and improvements: Faster move generation: 8438359 Instead of calling make/unmake move to check legality of generated king moves, just remove the king from the board and check if the destination square is attacked Store masks, magics, shifts and attacks in a single lookup array during sliding piece move generation, instead of in separate arrays. Use int for Move instead of short - gain from decreased memory does not outweigh cost of constant casting to int Small optimisations in Bitwise, PinCalculator

A tournament exclusively of new versions of chess engines for Android. The winner was the Crystal 8 engine. In 2nd place was Clover 6.1.2.4 JA , which was only half a point less than the winner. In third place was the Velvet 7.3.0 engine, which was the only one to win one game with the winner. 🕓 Time 3' 💻Tablet - Smasung Galaxy TAB S6 Lite, 4GB RAM 💾    72 games from the tournament download    🖬 GUI-Chess Tournament for Android, Country - Poland, City -  Malbork 💾 All CEDR games  21.612 games download  (3')  P Engine CEDR Score Cr Cl Ve Xi We Fl Fa Tu To Chg +/-/= 1: Crystal 8 3476 14.5 / 16 XX =1 10 11 11 11 11 11 11 +6 (+14 -1 =1) 2: Clover 6.1.2.4 JA 3316 14.0 / 16 =0 XX 11 =1 11 11 11 11 11 +13 (+13 -1 =2) 3: Velvet 7.3.0 3115 12.0 / 16 01 00 XX 01 11 11 11 11 11 +16 (+12 -4 =0) 4: Xiphos 0.61 JA 3165 11.5 / 16 00 =0 10 XX 11 11 11 11 11 +5 (+11 -4 =1) 5

  Dear sponsors and friends. Another update of the MEGA disk in May We hope your download will be quick. Thank you for supporting our work. MEGA Dysk - update  19.05.2024  ( 56 chess engines) Windows: (49 files): Akira CE 1.0.16.7z Akira CE 1.0.18.7z Akira CE 1.0.19.7z Akira CE 1.1.1.7z Alibaba 1.40 JA.7z Alouette 0.1.7.7z Altair 7.0.3 JA.7z Arcanum 2.1 NNUE.7z Aurora Amateur Series 2024-04-26.7z CalvinChess 3.3.0.7z Clover 6.1.2.4 JA.7z Drofa 4.1.1 JA.7z Eubos 3.5.7z Fatalii 0.7.0.7z GitChess 1.0.7z HypnoS 100524.7z HypnoS 160524.7z Integral v1.7z Jackychess 24.04.7z LizardBrain.7z Lozza 2.6 JA.7z MadChess 3.2.1.7z Marauders 3.4.7z Open-Tal 1.1 JA.7z Oxidation 0.7.0.7z Piglet 1.3.6.7z PyTuroChamp JA.7z Rodent NN JA.7z RukChess 3.0.19 NNUE.7z SF PB-050524.7z SF PB-130524.7z SF PB-180524.7z Simbelmyne 1.7.0.7z Sloth 1.8.7z Stockfish 24051514.7z Stockfish 24051514Geschwentner.7z Stockfish 24051612.7z Stockfish 24051807.7z Sun 12.7z Sun 13.7z Tactical Titan.7z Tcheran 2.3.7z Titan 1.0.0.7

 A small test tournament of new versions of amateur chess engines was won by Demolito 2023-11-04 . In 2nd place - Flounder 0.5.0.0 and in 3rd place - Simbelmyne 1.7.0 . Several engines were generating errors. All CEDR  333.448 games download  (01.05.2024 - 3'+3")  💾  210 games from the tournament download  👍 @chessenginesdiary  Country - Poland, City -  Malbork 🕓 Time 3'+3" 💻Dell G15 SE, i7-11800H RAM 16,0 GB 🖬 GUI-Banksia Tech table: Engine KN/move NPS dep/mov time/mov mov/game time/game fails Adachess 4.0 1971 450286 5.1 4.4 49.9 218.3 Albatros 1.0.0 620 160071 9.9 3.9 59.3 229.9 Alibaba 1.40 JA 7172 727492 8.0 9.9 22.7 223.3 23 Alouette 0.1.7 0 0 0.0 0.0 0.0 0.0 Arcanum 2.1 5053 922008 13.8 5.5 55.5 304.2 Atlas 4.25 *crash 0 0 0.0 0.0 0.0 0.0 28 Aurora 1.11.4 371 73448 20.4 5.0 58.5 294.9 Camel 1.5.1 1759 340863 13.7 5.2 59.6 307.4 Demolito 2023-11-04 16895 3251159 21.8 5.2 50.2 260.6 Fatalii 0.7.0 3021 579662 14.6 5.2 60.2 313.7

  The first public release of Integral Author - Aron Petkovski Estimated Elo Rating Using Stash v22 (2770 CCRL Blitz) as a baseline for comparison, Integral is estimated to be around 2830 CCRL Blitz Score of ./integral.exe vs ./stash-22.0-windows-x86_64-modern.exe: 317 - 166 - 179  [0.614] 662 ...      ./integral.exe playing White: 168 - 87 - 75  [0.623] 330 ...      ./integral.exe playing Black: 149 - 79 - 104  [0.605] 332 ...      White vs Black: 247 - 236 - 179  [0.508] 662 Elo difference: 80.7 +/- 23.0, LOS: 100.0 %, DrawRatio: 27.0 % SPRT: llr 2.95 (100.2%), lbound -2.94, ubound 2.94 - H1 was accepted Also thank you to the people in the Stockfish Discord who were extremely helpful and kind! Integral v1 download