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New version chess Engine: Uralochka 3.41

Uralochka - UCI chess engine Author: Ivan Maklyakov  Rating Chess Engines Diary CEDR=3616 UCI-compatible chess engine using Alpha-beta search and NNUE-like neural network. The engine implements: Basic control options (search to depth, time per move, time per game, time per N moves). Support for Syzygy endgame tables. Multithreading. Builds for different processor extensions (SSE, AVX2, AVX512) and operating systems (Windows, Linux). Engine architecture (everything is like most engines of this level): Position representation and move generation - magic beatboards. Sorting moves: moves from the transposition table, good captures by SEE, killer moves, quiet moves by history, bad captures by SEE. Search - PVS, Aspiration search, Quiescence Search. And all possible abbreviations and cuts in the search (Null move, Static null move, abbreviations for quiet moves, Futility pruning, SEE prunung, LMR for quiet moves). Transposition table for sorting moves, cuttings and for evaluation caching.
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Recent posts

New version strong chess engine: Altair 7.0.3 JA (Windows and Linux)

Altair   is a uci chess engine that succeeds my old python engine Antares. Rating CEDR=3536  author:  Alexander Tian v.7.0.3 JA: Altair v7.0.3 64 JA Not a new release but new compiles. Windows/Linux clang profiled builds. Altair 7.0.0 - results: Booot 7.3 11.5/20 +3 20 Games Alexandria 6.0 7.5/20 -5 20 Games Caissa 1.17 5/20 -10 20 Games Seer 2.8.0 3.5/16 -9 16 Games RubiChess 20240112 4.5/14 -5 14 Games Ethereal 14.25 3.5/14 -7 14 Games Lizard 10.2 5.5/12 -1 12 Games Peacekeeper 2.30 6/10 +2 10 Games Willow 4.0 6/10 +2 10 Games Texel 1.11 6/10 +2 10 Games Tenax 0.9.5 5/10 +0 10 Games Uralochka 3.41 dev1 4.5/10 -1 10 Games RofChade 3.1 4.5/10 -1 10 Games Stormphrax 4.0.0 4/10 -2 10 Games Velvet 7.0.0 4/10 -2 10 Games Obsidian 10.0 3.5/10 -3 10 Games Clover 6.1 3.5/10 -3 10 Games Berserk 12.1 2/10 -6 10 Games Viridithas 12.0.0 5/8 +2 8 Games Pawn 3.0 4.5/8 +1 8 Games Koivisto 9.2 4/8 +0 8 Games Altair 7.0.3 JA download
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New version chess engine: Toga IV NNUE 1.1 JA (Windows, Android and Linux)

Toga IV - UCI engine ( based on Toga II 4.0 now with Rebel 14.1 NNUE evaluation Rating Chess Engines Diary CEDR=3293 Toga IV v1.1 NNUE by Fabien Letouzey, Thomas Gaksch, Jerry Donald Watson Rebel NNUE 14.2 evaluation added by Chris Whittington and Ed Schroder Toga IV NNUE v1.1 64 ja Not a new release but new compiles. Windows/Linux & Android profiled builds Toga IV NNUE 1.1 JA download
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Chess engine: Rodent NN JA (Windows and Linux)

Rodent - UCI chess engine, Author = Pawel Koziol (Poland)  & Bernhard C. Maerz (Germany) Rating Chess Engines Diary CEDR=2978 Rodent NNUE 1.0 - results: SeeChess 1.2 8/8 +8 8 Games Mayhem 7.3 4.5/8 +1 8 Games Baislicka ac327fd 7/7 +7 7 Games MinimalChess 0.6 6.5/7 +6 7 Games Tantabus 2.0.0 5.5/7 +4 7 Games Galjoen 0.41.2 5/7 +3 7 Games ECE 20.1 5/7 +3 7 Games NiCim 3.4 3.5/7 +0 7 Games Monolith 2 2.5/7 -2 7 Games Badchess 0.4.4 6/6 +6 6 Games NoC 4.20 5.5/6 +5 6 Games Bienchen 1.0 5/6 +4 6 Games Bagatur 3.3 2/6 -2 6 Games Uralochka 3.36c 0.5/6 -5 6 Games Counter 4.1 0.5/6 -5 6 Games Igel 3.1.0 0/6 -6 6 Games Claudia 0.51 5/5 +5 5 Games MadChess 3.2 beta 3.5/5 +2 5 Games FabChess 1.16 2/5 -1 5 Games OliThink 5.10.5 2/5 -1 5 Games Cheng 4.41 1.5/5 -2 5 Games Not a new release but new compiles. Rodent NN 64 ja Windows & Linux profiled builds Rodent NN JA - download
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Chess engine: Tucano 11.19 JA

Tucano - winboard/UCI chess engines,  Author - Alcides Schulz Rating Chess Engines Diary CEDR=3411 v.11.19 JA: Tucano v11.19 64 ja Windows/Linux/Android clang profiled builds Individual statistics: Tucano 11.00.1: Marvin 6.2.0 10/24 -4 24 Games Xiphos 0.6.1 9.5/16 +3 16 Games BlackCore 6.0 8/14 +2 14 Games Avalanche 1.5.0 8.5/12 +5 12 Games Caissa 1.11 1/12 -10 12 Games Midnight 7 9.5/10 +9 10 Games Willow 3.0 8/10 +6 10 Games Stormphrax 1.0.0 6.5/10 +3 10 Games Zahak 10.0 5.5/10 +1 10 Games Gogobello 3.0 5.5/10 +1 10 Games Stash 35.0 4.5/10 -1 10 Games Komodo 14.1 4.5/10 -1 10 Games Texel 1.09 4.5/10 -1 10 Games Smallbrain 7.0 4/10 -2 10 Games Alexandria 4.0 3.5/10 -3 10 Games Stockfish 16 1/10 -8 10 Games Coiled 1.2 8/8 +8 8 Games Wahoo 3.0.0 8/8 +8 8 Games Knightx 3.8 8/8 +8 8 Games Cadie 1.5 7/8 +6 8 Games Critter 1.6a 7/8 +6 8 Games Tucano 11.19 JA download
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Chess engine: Drofa 4.1.1 JA (Windows and Linux)

  Drofa -  UCI chess engine (written in C++11), Author :  Alexander Litov. Rating Chess Engines Diary CEDR=3285 Drofa started as fork of the Shallow Blue chess engine.  v.4.1.1: Drofa v4.1.1 64 ja Windows/Linux clang profiled builds  Major gainers: Tuning of the pre-move-loop pruning SEE rewrite, in accordance to what is used in top engines Using ALPHA cutoffs in the TT SPSA of the incremental TM (big thanks for AGE for implementing SPSA for openbench) Rewriting TT allocation and probing Regression on the Pohl.pgn book Elo   | 51.91 +- 3.55 (95%) Conf  | 40.0+0.40s Threads=1 Hash=64MB Games | N: 20000 W: 6892 L: 3926 D: 9182 Penta | [150, 1510, 4217, 3470, 653] You can expect much less elo on a balanced books and/or while using non-incremental TM As per usual, choose the binary with best speed, but building using make should give a better binary Drofa 4.1.0 - results: Mida 2.3 10/17 +3 17 Games Protej 20231212a 11.5/15 +8 15 Games Cool Iris 11.80 0.5/15 -14 15 Games Obsidian 9.0 0/15
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New version chess engine (java): Lozza 2.6 JA

Lozza - Javascript chess engine inspired by Fabien Letouzey's Fruit 2.1. Lozza was an exercise in principal variation search and hand-coded evaluation. It's easy to use Lozza into your web projects. Communication is via the UCI protocol, which also allows it to be used offline in chess user interfaces via Nodejs (etc.). v.2.6 Javascript chess engine converted to standalone executable. Lozza 2.6 64 ja Play Lozza online here:- https://op12no2.github.io/lozza-ui/ Changes 2.5 10/02/23 Test for draws in QS. Bench 4549628. 2.5 10/02/23 Simplify UCI reporting. 2.5 09/02/23 Process command line args when invoked with Node. 2.5 09/02/23 Add a bench command using Ethereal FENs at depth 9. Bench 4625388. 2.5 09/02/23 Use TT in qsearch, but do not overwrite existing entries with depth > 0. 2.5 05/02/23 Clear best move on fail low and don't allow timeout until there is a best move. 2.5 03/02/23 Return/store bestScore not oAlpha on fail low in search. 2.5 03/02/23 Increase/decrease
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Chess engine: Clover 6.1.2.4 JA

Clover - UCI chess engine Author: L uca Metehau Rating Chess Engines Diary CEDR=3645 v.6.1.2.4: Clover 6.1.2.4 64 ja Windows/Linux/Android clang profiled builds Clover 6.1.19 - results: Rebel 16.3 15/30 +0 30 Games Alexandria 6.1.0 12.5/24 +1 24 Games RubiChess 20240112 11.5/23 +0 23 Games Obsidian 12.0 10/18 +2 18 Games Berserk 13 9.5/18 +1 18 Games Uralochka 3.41 dev3 12/17 +7 17 Games Ethereal 14.25 9/17 +1 17 Games Chess-System-Tal-2 8.5/16 +1 16 Games Caissa 1.18 8/16 +0 16 Games Velvet 7.3.0 10/14 +6 14 Games Vafra 14.12.1 Stockfish 8/14 +2 14 Games Viridithas 12.0.0 8/11 +5 11 Games Seer 2.8.0 6.5/11 +2 11 Games Rice 8.0.0 6.5/10 +3 10 Games Obsidian 11.0 5/10 +0 10 Games Fire 9.3 5/9 +1 9 Games Stockfish 16.1 4/9 -1 9 Games Jet 1.2 7.5/8 +7 8 Games Black Marlin 9.0 4/8 +0 8 Games Lizard 10.3 5.5/7 +4 7 Games Clover 6.1.19 - tournament results: 2024.03.19.NewStrongEnginesTest 12.5/24 +1 2024.03.21.New.StrongEnginesTournament 40/71 +9 Ranking 1 2024.03.21.StarWars.ClonesTourn
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Chess engine: Winter 3.10a JA

Winter is a chess engine that relies on the UCI protocol to communicate with a GUI. Contributors: Jonathan Rosenthal,  Jonathan Maurer,  Jonas Kuratli. Rating Chess Engines Diary CEDR=3369  v.3.10a: Winter v3.10a 64 JA update Windows/Linux/Android clang profiled builds Winter 3.0 - results: Peripheral 1.1.3 8/8 +8 8 Games Yuli GM Pro 16 1/4 -2 4 Games Yuliirma 4.0 1/4 -2 4 Games ShashChess 34.6 0.5/4 -3 4 Games Booot 7.3 1.5/3 +0 3 Games Arasan 24.1 1.5/3 +0 3 Games RofChade 3.1 1/3 -1 3 Games Stockfish 16.1 0.5/3 -2 3 Games Clover 6.1 0.5/3 -2 3 Games Omelette 1.0 2/2 +2 2 Games Saturn 1.1 2/2 +2 2 Games Mikaz 1.0 2/2 +2 2 Games Odonata 0.8.0 2/2 +2 2 Games TDFA 1.1.0 2/2 +2 2 Games Kobra 1.0a 2/2 +2 2 Games Patricia 1.0 1.5/2 +1 2 Games Reckless 0.5.0 1.5/2 +1 2 Games Texel 1.11 1.5/2 +1 2 Games Willow 4.0.0.1 1/2 +0 2 Games Obsidian 11.0 1/2 +0 2 Games Winter 3.0 - Tournament results 2024.02.29.NewEnginesTest 15.5/27 +4 Ranking 1 2024.03.08.4LeagueCEDR.edition02.2024 15.5/30
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New version chess engine: Akira CE 1.1.1

  Akira CE - winboard chess engine Author: Adam Adair Version: 1.0.19 Another clock fix. Approx. CCRL rating: 1750,  CEDR ranking - engine not tested yet Akira CE 1.1.1 download Akira CE 1.1.1 download
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Chess engine: Zangdar 2.29.01

Zangdar -  UCI chess engine (written in C++11). Rating CEDR=2954 v.2.29: There is not a lot of modifications, but only some improvements in history pruning. This should bring Zangdar near 3200 elo. I put binaries for several architectures, sorted by strength x86-64 popcnt avx2 bmi2-nopext bmi2-pext 5950X-nopext 5950X-pext Zangdar 2.24 - results: Cheng 4.42 2.5/6 -1 6 Games ChessBrainVB 4.02 2/6 -2 6 Games Maxwell 3.0.7 4/4 +4 4 Games Shuffle 4.4.0 4/4 +4 4 Games Eubos 3.00 4/4 +4 4 Games Thrawn 2.0 2.5/4 +1 4 Games Ceibo 1.0 1.5/4 -1 4 Games Critter 1.6a 0.5/4 -3 4 Games Clarity 4.0.0 0/4 -4 4 Games Akimbo 0.8.0 0/4 -4 4 Games Seer 2.8.0 0/4 -4 4 Games Jet 1.1 2.5/3 +2 3 Games Dumb 2.0 2/2 +2 2 Games MinimalChess 0.6 2/2 +2 2 Games Oxidation 0.5.0 2/2 +2 2 Games Tcheran 1.1 2/2 +2 2 Games Blocky 1.0.0 2/2 +2 2 Games Austerlitz 1.4.7 2/2 +2 2 Games Kobra 0.1 2/2 +2 2 Games Maxwell 3.0.8 2/2 +2 2 Games Bagatur 3.7e 2/2 +2 2 Games Zangdar 2.29.01 download ( all versions:  Zangdar-2.29.
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