Chess Engines Diary

  Topas - UCI Chess Engine  Author: Sam Nelson Topas is an open source UCI chess engine written in Rust with a focus on clean, readable code.  Topas is a "from scratch" implementation I created as a hobby project with the goal of learning more about chess algorithms and Rust programming in general. v.1.3.3: The following features are implemented in this release: Universal Chess Interface (UCI) support, described in the README Chess board representation and fast attack/movement patterns using bitboards Negamax with alpha-beta pruning, using a principal variation search, to efficiently search to a configurable depth Iterative deepening with aspiration windows to allow for more efficient move ordering and time management Transposition tables (with Zobrist hashing) for fast lookup and enhanced move ordering Move ordering based on principal variation, cut nodes, capture moves sorted via MVV-LVA (Most Valuable Victim, Least Valuable Attacker), and killer moves Quiescence search wit

  Akira CE - winboard chess engine Author: Adam Adair Version: 1.0.7 Fixed ambiguous draw offerings and theirs acceptance from some real advantage. Calibrated time settings for extreme bullet plays (~200 ms per move, though less is still gonna lose on time) Approx. CCRL rating: 1750,  CEDR ranking - engine not tested yet Akira CE 1.0.7 download

 This small tournament of new chess engines was won by Raid 3.6 TR . Right behind him, ShashChess 35.2 and Stockfish 20240330 Ivec , half a point less. The new engine achieved quite good results in our tests - Motor 0.4.0 💾  650 (!) games from the tournament download   👍 @chessenginesdiary  Country - Poland, City -  Malbork 🕓 Time 3'+3" 💻 Dell G15 SE, i7-11800H RAM 16,0 GB  🖬 GUI-Aquarium All  CEDR  317.321 games download  (01.04.2024 - 3'+3")  Pl Engine 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 Sco 1 Raid 3.6 TR = = 1 0 = = = = = = = 1 = 1 = = = = = 1 1 1 1 = 1 1 1 1 1 1 1 1 23.0 2 ShashChess 35.2 = =

The April compilation Stockfish 20240411 won the tournament. Two Stockfish varieties, Yuliirma 4.0 and HypnoS 030424 , were half a point behind. Among the new versions of other engines, it is worth paying attention to the good result of the Saturn 1.3 . 💾  650 (!) games from the tournament download   👍 @chessenginesdiary  Country - Poland, City -  Malbork 🕓 Time 3'+3" 💻 HP Pavilion i5-1035G1 8GB RAM  🖬 GUI-Banksia All  CEDR  317.321 games download  (01.04.2024 - 3'+3")  Tech table: Engine KN/mov NPS dep/mov time/mov mov/game time/game fails Arasan 24.2.1 3334 478540 25.8 7.0 42.4 295.4 Caissa 1.18 5559 1037325 27.2 5.4 56.6 303.4 Cheng 4.47 4722 784546 19.4 6.0 51.1 307.6 CiorapBot 0.3 740 173434 19.3 4.3 42.9 183.0 Cool Iris 12.10 2812 463666 24.9 6.1 52.0 315.2 Critter 1.6a 10434 1662340 18.4 6.3 47.3 296.6 DanaSah 9.1 1411 243085 18.1 5.8 60.5 351.3 Fatalii 0.6.1 1316 200899 12.3 6.5 39.0 255.7 Fire 9.3 5300 944082 20.4 5.6 56.8 3

Today start 1 League Chess Engines Diary, edition 03/2024 Time: 3'+3"  GUI-Fritz 17 1 League Edition 03/2024 - 3’+3” Rating 1. SugaR Al SE 3725 2. Lc0 BT4 3712 3. Dragon 3.3 3711 4. Stockfish 16.1 3760 5. Corchess 20240422 3750 6. Berserk 13 3692 7. ShashChess 35.2 3747 8. RubiChess 20240112 3650 9. Clover 6.1.19 3644 10. Caissa 1.18 3671 11. Rofchade 3.1 3620 12. Chess-System-Tal-NNUE-2 3642 13. Alexandria 6.1.0 3622 14. Obsidian 12 3660 15. Slowchess 2.9 3554 16. Koivisto 9.20 Impan 3611 TOP-64 League Chess Engines Diary -  more

Stockfish - UCI chess engine, compiled by Ivec Rating CEDR=3742 We highly recommend this Stockfish compilation (by Ivec). The engine performs very well in our tests. Chess Engines Diary Team. Stockfish 20231024 Ivec - results: Z5 2.1 6/6 +6 6 Games Seer 2.7.0 4.5/6 +3 6 Games Polyfish 231022 3/6 +0 6 Games Brainlearn 26.1 3/6 +0 6 Games Berserk 12 3/6 +0 6 Games Obsidian 6.0 4/4 +4 4 Games Pawn 2.0 4/4 +4 4 Games Lynx 0.19.0 4/4 +4 4 Games Pingu 2.0.0 4/4 +4 4 Games Alpaca 0.2.5 4/4 +4 4 Games Mida 2.2 4/4 +4 4 Games Boychesser 1.0 4/4 +4 4 Games Tofiks 1.3.0 4/4 +4 4 Games Sirius 5.0 4/4 +4 4 Games RukChess 3.0.16 3.5/4 +3 4 Games SF PB 221023 2/4 +0 4 Games ShashChess 34.1 2/4 +0 4 Games Raid 2.78i_X 2/4 +0 4 Games Vafra 12.5 Cfish 2/4 +0 4 Games Hazard 3.78 2/4 +0 4 Games Lux 3.4 2/2 +2 2 Games Stockfish 20240421 Ivec NNUE  download

Hazard -  (Stockfish derivatives) by Tanick Ramz  Rating Chess Engines Diary CEDR=3742 Note: We have added the necessary nnue files to the engine! Hazard 4.21  - results with other engines: Eman 9.90 33/62 +4 62 Games Brainlearn 27 22.5/48 -3 48 Games Leptir Big-Ultra 23/44 +2 44 Games ShashChess 34.6 22.5/44 +1 44 Games SF-PRO 05.02.2024 19/40 -2 40 Games AbbyStein 2.8 17.5/36 -1 36 Games INCOGNITO 5 PRO 17/34 +0 34 Games Leptir 230124 15.5/30 +1 30 Games Kookaburra 2.00 13.5/26 +1 26 Games Sawfish 2TC 13/26 +0 26 Games Cool Iris 11.80 12/24 +0 24 Games Dragon 3.3 12/22 +2 22 Games CorChess 20240209 11.5/22 +1 22 Games Stockfish 20240209 11/22 +0 22 Games Deep Blue 20230628 10.5/22 -1 22 Games Stockfish 20240214 10.5/20 +1 20 Games SF-PRO 19.01.2024 10.5/20 +1 20 Games CorChess 20240122 10/20 +0 20 Games Polyfish 240112 10/20 +0 20 Games CorChess 20240213 9.5/20 -1 20 Games Killfish 071223 9/18 +0 18 Games Hazard 4.21  - tournament results: 2024.01.20 AcerArenaTournament 38.5/50 +2

  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. 👍The Chess Engines Diary team recommends this engine for analyzing chess games and particularly complex positions. Thanks to the Author  Ivan Ivec Rating CEDR=3750 (3'+3")    CorChess 20240422 download CorChess 20240323  - results: Yuliirma 4.0 6/12 +0 12 Games SF-PRO 16.03.2024 6/12 +0 12 Games Yuli GM Pro 16 5.5/12 -1 12 Games Big-SF 220324 5/10 +0 10 Games Deep Blue-20240315-killer 5/10 +0 10 Games Stockfish 20240322 5/10 +0 10 Games Kookaburra 2.00 5/10 +0 10 Games HypnoS 240324 5/10 +0 10 Games JigSaw 5.1 5/10 +0 10 Games Incognito 8 5/10 +0 10 Games Cool Iris 12.20 D-3072 5/10 +0 10 Games Ippolit 032324 6/6 +6 6 Games Stockfish 20240322 Ivec 3/6 +0 6 Games Stockfish 16.1 3/6 +0 6 Games SF 16.1 MPV 3/6 +0 6 Games Big-SF 210324 3/6 +0 6 Games HypnoS 190324 3/6 +0 6 Games Maraud

  Crystal is a free, powerful UCI chess engine derived from Stockfish.  Author: Joseph Ellis, Rating  Chess Engines Diary Rating for Android  CEDR=3476 Crystal 240223 for Android download Crystal 8 for Android download Fatalii - UCI chess engine Author: Patrick Heck,  Rating  Chess Engines Diary Rating for Android  CEDR=1728 Fatalii 0.6.1 for Android download Velvet 7.3.0 for Android,  Author: Martin Hornet,  Rating Chess Engines Diary Rating for Android CEDR=3115 Velvet 7.3.0 for Android download More about engines for Android can be found on the website: " Android "

Stockfish 2024042112  - UCI chess engine, compiled by  cj5716 Rating CEDR=3760 Stockfish 2024042112 (all versions) download Timestamp: 1713703804 Tweak TT aging and replacement strategies We change the definition of "age" from "age of this position" to "age of this TT entry". In this way, despite being on the same position, when we save into TT, we always prefer the new entry as compared to the old one. Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 152256 W: 39597 L: 39110 D: 73549 Elo +1.11 Ptnml(0-2): 556, 17562, 39398, 18063, 549 https://tests.stockfishchess.org/tests/view/6620faee3fe04ce4cefbf215 Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 51564 W: 13242 L: 12895 D: 25427 Elo +2.34 Ptnml(0-2): 24, 5464, 14463, 5803, 28 https://tests.stockfishchess.org/tests/view/66231ab53fe04ce4cefc153e closes #5184 Bench 1479416 Stockfish 20240210 - results: ShashChess 34.6 14.5/28 +1 28 Games Brainlearn 27 13.5/26 +1 26 Games Kookaburr