Chess Engines Diary

Anura - UCI chess engine Author: Joseph Pasfield  My attempt to learn rust, by making another chess engine in it. Anura was chosen as the name because it's the biological order of frogs. Current notes: Anura 1.0 will be released when it hits or surpasses 3000 Elo CCRL Blitz, + 30 or so for some margin of error. Goals: Multilayer value inference Threat Inputs (value and policy) SEE outputs (policy) generally increase HLs overall anything else I can think of Jim Ablett compiles Anura 0.2.0 JA download

PurplePanda   Have fun exploring the code or playing the engine (UCI). Author - Jakob256 Version 19:   Score against Version 18: 64% (+100 Elo) moveordering refactored and considers "defended by a pawn" for own pieces if depth2go>=4 and no hashmove is available, a shallow search is used to find the most promising move beta-pruning at depth2go=1,2,3 with margins 0cp, 250cp and 500cp 4 captures extend the search by 2 ply repetition detection: if a position occures twice in the search tree, it is evaluated as drawn Purple Panda 18 vs other engines: Eveann 1.73 0.5/10 -9 10 Games Seawall 20240926 0/10 -10 10 Games Amelia 0.12 3.5/8 -1 8 Games Yakka 1.1 0/8 -8 8 Games Dirty 0/8 -8 8 Games Sapling 1.1.1 0/8 -8 8 Games Neuromancer 1.5 3/6 +0 6 Games Kairuku 1.0.1 JA 2/3 +1 3 Games Alpaca 0.2.6 1/3 -1 3 Games Eveann 2.1 0/3 -3 3 Games Lozza 3 Dev.874772a JA 0/3 -3 3 Games Perseus 0.9-alpha 0/3 -3 3 Games Amelia 0.15 2/2 +2 2 Games Brogle 0.1.0 2/2 +2 2 Games Freda 1.0 0.5/2 -1 2 G...

    Today, a new version of the SF professional (SF-PRO) chess engine was released, 27.12.2024. This engine has a CEDR rating =  3766 . We are starting testing this engine today.  For now, it is only available to our testers. Chess Engines Diary Team Check out the blog post:  SF-PRO 27.12.2024 wins Android Chess Engines Tournament, 2024.12.27-28

The post-holiday tournament for Android engines was won by the latest SF-PRO 27.12.2024 . In 2nd place was the Caissa 1.20 engine and in 3rd place was the Stockfish 20241208 engine. Further tests are ongoing, results soon on our website. Chess Engines Diary Team   🕓 Time 3' 💻Tablet - Smasung Galaxy TAB S6 Lite, 4GB RAM 💾    132 games from the tournament download    🖬 GUI-Chess Tournament for Android, Country - Poland, City -  Malbork 💾 All CEDR games for Android  23.184 games download  (3')  P Engine CEDR Score (Tie) Chg +/-/= 1: SF-PRO 27.12.2024 2950 18.5 / 22 173.00 +77 (+15 -0 =7) 2: Caissa 1.20 3480 18.0 / 22 166.75 -4 (+14 -0 =8) 3: Stockfish 20241208 3535 16.5 / 22 148.50 -24 (+13 -2 =7) 4: Plentychess 3.0.0 JA 3281 15.0 / 22 137.50 -18 (+10 -2 =10) 5: Motor 0.7.0 3353 14.0 / 22 109.25 ...

This is the initial release of the chess engine Eques . Added features will be documented in future releases in the format below, and in docs/changelog.md. Engine Bitboard representation Magic bitboards for slider move generation Zobrist hashing Search Negamax search framework Alpha-Beta pruning MVV-LVA move ordering PV move ordering Check extensions Quiescence search Time-control logic supporting classical, rapid, bullet, and ultra-bullet time formats. Repetition detection Evaluation Material evaluation Tuned piece-square tables AdaGrad gradient descent Texel Tuner Eques 1.0.0 download

  DON   - UCI chess engine Author: Ehsan Rashid DON is a free UCI chess engine. It is not a complete chess program and requires some UCI-compatible GUI (e.g. XBoard with Polyglot, eboard, Arena, Sigma Chess, Shredder, Chess Partner or Fritz) in order to be used comfortably.  GreKo 2020.03 5.5/6 +5 6 Games Fritz 17 2.5/4 +1 4 Games Rodent IV 3/3 +3 3 Games Counter 3.5 2/2 +2 2 Games Orion 0.6 2/2 +2 2 Games Maelic SuperStar 2/2 +2 2 Games EXchess 7.97b 1.5/2 +1 2 Games Roc 1.6 1.5/2 +1 2 Games Jinx 1.0 1.5/2 +1 2 Games Benjamin 1.0 1.5/2 +1 2 Games RofChade 2.3 1.5/2 +1 2 Games Monolith 2 1/2 +0 2 Games Booot 6.4 1/2 +0 2 Games Fizbo 2 1/1 +1 1 Games Fire 7.1 0.5/1 +0 1 Games Xiphos 0.6.1 0.5/1 +0 1 Games DON 4.5 download

Shadowfax can finally play chess! Give it a go by linking it to a chess gui. Both En-Crossiant (mac) and Arena Chess (windows) have been tested and will work. Shadowfax 0.0.0 download

Zangdar -  UCI chess engine (written in C++11). Rating Chess Engines Diary CEDR=2959 v.3.04 NNUE: I finally entered the NNUE world. With a big increase in strength. The first network was simple (768->128)x2->1, and was created with the last version of Zangdar, still HCE. After that, I made a second network (768->256)x2->1, with an intermediate version of Zangdar using the first network. I generate for that 600 millions fens, and used Bullet as a trainer. Zangdar can also use SIMD instructions for AVX2 processors. Unfortunately, I don't have a AVX512 computer, so I can't give binaries for that. The classic evaluation and the tuner have been removed, as they don't have any use now. There are also some corrections here and there, the usual. I give only binaries for AVX2, BMI2, and native; the old architecture are too old. Zangdar 2.31 vs other engines: LazySMP 5.0 6/8 +4 8 Games Ifrit 4.3 JA 6/8 +4 8 Games Critter 1.6a 4.5/8 +1 8 Games Molybdenum 4.1 1.5/8 -5 8 Ga...

The tournament of the strongest chess engines was won by the Kookaburra 3.00 engine. Places 2 to 4 were taken by the engines: Killfish 021224, Sailfish 4.0 and Deep Blue-20240518 . The order was decided by the additional score - Berger. More tests are underway, results soon on our website. Chess Engines Diary Team 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"   1140 (!) tournaments games download    💾 All games CEDR  515.173 games download  01.12.2024   @chessenginesdiary P Engine Score (Tie) +/-/= 1: Kookaburra 3.00 60.0 / 114 3409.00 (+6 -0 =108) 2: Killfish 021224 58.5 / 114 3329.00 (+3 -0 =111) 3: Sailfish 4.0 58.5 / 114 3327.75 (+4 -1 =109) 4: Deep Blue-20240518 58...