Chess Engines Diary

  🥇 Velvet 7.3.0  🥈 Igel 3.55  🥉 Dragon free Promotion to the 1 League:  Velvet 7.3.0,  Igel 3.55,  Dragon free .  Relegation to the 3 League:  Komodo 14.1,  Minic 3.41,  Wasp 6.50. 🕓 Time 3'+3" 💻Dell G15 SE, i7-11800H RAM 16,0 GB 🖬 GUI-Arena All  CEDR  317.321 games download  (01.02.2024 - 3'+3")  x  💾  240 games from the tournament download   👍 @chessenginesdiary  Country - Poland, City -  Malbork League – strongest chess engines CEDR TOP 64 1 League Edition 03/2024 - 3’+3” Rating Score note 1. SugaR Al SE 3725 18.5 / 30 2. Corchess 20240422 3750 17.5 / 30 3. ShashChess 35.2 3747 17.0 / 30 4. Lc0 BT4 3712 17.0 / 30 5. Stockfish 16.1 3760 16.5 / 30 6. Dragon 3.3 3711 16.5 / 30 7. Berserk 13 3692 16.0 / 30 8. Obsid

Bitbit -  chess engine written in C. Author: Isak Ellmer (Sweden) All other files are licensed under the Creative Commons Attribution-ShareAlike  4.0 license (CC BY-SA 4.0). That includes this file, the various binary files  and any files that do not have a license notice for GPLv2. A copy of CC BY-SA  4.0 is available at <https://creativecommons.org/licenses/by-sa/4.0/>.   Bitbit 1.1 download

Our next test, a large tournament in which over 1,000 games were played, was won by the Yuliirma 4.0 chess engine. This engine is only available to our testers. In second place is the official version of Stockfish 16.1 and in third place is Stockfish 20240421 . GPU NVIDIA  RTX 3060 ti. GUI-Banksia, For Every Engine only 1 CPU and 512 Hashtables, Book - short ICCF book,  6TBs. 🕒🕒Time 3'+3"   1050 (!!!) tournaments games download   💾 All games CEDR  317.321 games download  01.04.2024  (3'+3")    @chessenginesdiary

 Another large testing tournament of the most powerful chess engines is uploaded by the official version of Stockfish 16.1 . In second and third place, respectively, are the SF-PRO 13/04/2024 and Yuli GM Pro 16 engines, which are currently only available to our testers. Places 20 to 25 for chess engines that are not Stockfish clones or variants. 💾  600 (!) 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 AbbyStein v2.8 1783 381545 36.4 4.7 66.3 309.8 AI 28.0 2757 509427 33.1 5.4 57.5 311.0 Alexandria 6.1.0 2776 526280 29.5 5.3 66.8 352.1 Arasan 24.2.2 3315 496196 26.8 6.7 47.6 317.7 Berserk 13 4184 752718 32.8 5.6 63.3 351.9 Cool Iris 12.10 1832 313533 25.3 5.8 57.0 333.0 CorChess 20240422 1640 283008 26.5 5.8

Floyd  - UCI chess engine  ( for Windows, Linux and Android). Floyd 0.9 64 JA - not a new release but new builds. Rating CEDR=2380 Author- Marcel van Kervinck   Version 0.9: m ain changes: Gained approximately 180 elo at fast time controls Better handling of zugzwang positions Fixed illegal moves deep in PV (reported by Dirk-Jan D.) Full solution for the "0readyok" problem: also don't split info lines Able to abort search in Python module (e.g. by Ctrl-C)  Under the hood: Added history counters for move ordering Improved move ordering for killers Improved null move pruning/reductions (aka verification) Added delta pruning Added hanging piece evaluation Added basic futility pruning, razoring and stand pat pruning Some minor evaluation weight tuning Simplified UCI move printing Eliminated spurious "Illegal move" in debug mode  Floyd 0.9 - download All files (games, tables and engines) - download from page

Obsidian 12.0 won the tournament of weaker engines and on a weaker computer. In second place, half a point less, was the Alexandria 6.1.0 engine. In third place was Rebel 16.3 . Clover 6.1.19 also achieved a good result. 💾  552 (!) games from the tournament download   👍 @chessenginesdiary  Country - Poland, City -  Malbork 🕓 Time 3'+3" 💻 Lenovo Z710 i7-4710MG 8GB RAM  🖬 GUI-Arena All  CEDR  317.321 games download  (01.04.2024 - 3'+3")  P Engine Rtng Score Chg +/-/= 1: Obsidian 12.0 3660 39.0 / 46 +18 (+32 -0 =14) 2: Alexandria 6.1.0 3620 38.5 / 46 +18 (+31 -0 =15) 3: Rebel 16.3 3644 38.0 / 46 +9 (+30 -0 =16) 4: Clover 6.1.19 3644 37.5 / 46 +5 (+30 -1 =15) 5: Alexander 1.2 2400 34.5 / 46 +253 (+26 -3 =17) 6: Carp 3.0.1

  Camel is a chess engine written from scratch in Rust. It aims to achieve a high level of play, while also being easy to understand and modify. It is primarily meant to be used within a GUI compatible with the UCI protocol, but may also be operated in a CLI. Author: Bruno Mendes! Rating CEDR=2167 v.1.5.0: Changelog Prune losing captures with SEE in quiescence search Pack transposition table entries in 64 bits Fix wrong mate scores retrieved from the transposition table Tweak transposition table replacement scheme Probe transposition table hash move for pseudo-legality Disable double null move Disable futility pruning in endgame positions Search with full depth if reduced search raises alpha Add redundant mailbox to board for faster piece_at operations Add Win at Chess (WAC) tests to the test suite Estimated Strength Lichess: 2310 (Bullet), 2240 (Blitz), 2328 (Rapid) Against v1.4.0 [hash=64; threads=1]: ✅ Elo difference: 81.98 +/- 23.96 Camel 1.0.1 - results: Midnight 7 0/10 -10 10

  Simbelmyne  -  UCI engine Rating CEDR=2474 v.1.6.0: What's new This release mostly focuses on fleshing out the evaluation function. There's still a couple of things I might add/revisit, but I think this release adds all of the most important evaluation features. Score of Simbelmyne vs Simbelmyne v1.5.1 (2696): 2114 - 789 - 1409 [0.654] ...      Simbelmyne playing White: 1055 - 387 - 715  [0.655] 2157 ...      Simbelmyne playing Black: 1059 - 402 - 694  [0.652] 2155 ...      White vs Black: 1457 - 1446 - 1409  [0.501] 4312 Elo difference: 110.3 +/- 8.7, LOS: 100.0 %, DrawRatio: 32.7 % Added features 🔍 Search Tweak LMR values ⚖️: Evaluation 🔧 Eval refactor 🔧 Split eval up into incremental and non-incremental Include pawn attacks and pin masks in mobility considerations Add evaluation term for king tropism wrt. friendly/enemy passed pawns Add evaluation term for connected rooks Add evaluation term for rooks on semi-open file Add evaluation term for major piece on 7th rank Add

The big tournament (over 1,000 games played!) was won by CorChess 20240422 . It was a victory with a large advantage over three engines with the same points score: HypnoS 220424, Raid 3.6 TR and Yuli GM Pro 16 . GPU NVIDIA  RTX 3060 ti. GUI-Banksia, For Every Engine only 1 CPU and 512 Hashtables, Book - Super GM 4 mvs,  6TBs. 🕒🕒Time 3'+3"   1050 (!!!) tournaments games download   💾 All games CEDR  317.321 games download  01.04.2024  (3'+3")    @chessenginesdiary

  Akira CE - winboard chess engine Author: Adam Adair Version: 1.0.14 Multiple small changes in some engine weights. Approx. CCRL rating: 1750,  CEDR ranking - engine not tested yet Akira CE 1.0.14 download

Weiss - chess engine built with VICE by Bluefever as a base. Also inspired by Ethereal and Stockfish.  Rating JCER=3339    Author: Terje Kirstihagen (Jim Ablett compiles) Weiss 2.1 JA download Weiss 2.1 Impan - results: Zahak 10.0 6/11 +1 11 Games Gogobello 3.0 5.5/10 +1 10 Games Xiphos 0.6.1 4/8 +0 8 Games Little Goliath 3.17 3/7 -1 7 Games Defenchess 2.3 3.5/6 +1 6 Games Marvin 6.1.0 2/6 -2 6 Games Fisherov chess monk 1.2 0.5/6 -5 6 Games Andscacs 0.95092 4/5 +3 5 Games Critter 1.6a 4/5 +3 5 Games Mantissa 3.7.2 3.5/5 +2 5 Games Stash 35.0 2/5 -1 5 Games BlackCore 6.0 1.5/5 -2 5 Games Revenge 3.0 1/5 -3 5 Games Stash 34.0 3.5/4 +3 4 Games Toga IV 3/4 +2 4 Games StockDory Starfish 0.1 3/4 +2 4 Games Devre 4.0 2.5/4 +1 4 Games Tucano 11.00.1 2/4 +0 4 Games Fire NN 1072022 1.5/4 -1 4 Games Tucano 10.00 1.5/4 -1 4 Games