Chess Engines Diary

  We ran two more small tests on eight new chess engines for Android, with Eleanor 4.1 JA and Hobbes 3.0 JA delivering the best performance. More tests are in progress, and we’ll share the results soon. 🕓 Time 3' 💻Tablet - Smasung Galaxy TAB S6 Lite, 4GB RAM 💾 24 games from the tournament download    🖬 GUI-Chess Tournament for Android, Country - Poland, City - Malbork 💾 All CEDR games for Android 24.494 games download (3')

Several new versions of  chess  engines for   Android have recently been released. Here they are: Arasan 25.4 JA, Aurora 1.27.0 JA, Belofte 2.2.0 JA, Berserk 14 JA, Bread Engine 3.1.0 JA, Catalyst 3.0.0 JA, Eleanor 4.1 JA, Cataphract 1.4 JA, GOOB 2.0 JA . We'll start testing them soon, so stay tuned for the results. Chess engine for Android - Arasan 25.4 JA Rating CEDR=3204 Arasan 25.4 JA for Android download 👉 see post Arasan 25.4 JA for Windows Chess engine for Android - Aurora 1.27.0 JA Rating CEDR=??? Aurora 1.27.0 JA for Android download 👉 see post Aurora 1.27.0 JA for Windows   Chess engine for Android - Belofte 2.2.0 JA Rating CEDR=???? Belofte 2.2.0 JA for Android download 👉 see post Belofte 2.2.0 JA for Windows Chess engine for Android - Berserk 14 JA Rating CEDR=3498 Berserk 14 JA for Android download 👉 see post Berserk 14 JA for Windows Chess engine for Android - Bread Engine 3.1.0 JA Rating CEDR=??? Bread Engine...

Eleanor - a chess engine written in C++ Author: Mark ( rektdie) Eleanor Chess Engine Eleanor 4.0 what's new? Tested against Eleanor v3.0 LTC - 8 moves Elo   | 92.46 +- 10.54 (95%) Conf  | 40.0+0.40s Threads=1 Hash=64MB Games | N: 1000 W: 285 L: 25 D: 690 Penta | [0, 11, 247, 213, 29] https://rektdie.pythonanywhere.com/test/4426/ New net 8 king input buckets training tweaks Improved search too, see below. Engine can now run on multiple threads. Thanks to every rektbencher and @JonathanHallstrom for training nets for me! v.4.1: Fixed crashes on Windows and during SMP games. Eleanor 4.1 vs other engines: Stockfish dev-20260419 0.5/2 -1 2 games Tofiks 1.4.1 1/1 +1 1 games Pea 6.0 1/1 +1 1 games Luminex 5.11.0 1/1 +1 1 games Viking NNUE R4 1/1 +1 1 games Squid 0.3.1 1/1 +1 1 games FoxChess release v1.1 1/1 +1 1 games Ratsu 1.1.0 1/1 +1 1 games Kreveta 2.3.0 1/1 +1 1 games Minic 3.45 JA 0.5/1 +0 1 games Quanticade Phoenix 4.0 Dev 0.5/1 +0 1 games SF PB 100426 0.5/1 +...

Eleanor - a chess engine written in C++ Author: Mark ( rektdie) Eleanor Chess Engine Eleanor 4.0 what's new? Tested against Eleanor v3.0 LTC - 8 moves Elo   | 92.46 +- 10.54 (95%) Conf  | 40.0+0.40s Threads=1 Hash=64MB Games | N: 1000 W: 285 L: 25 D: 690 Penta | [0, 11, 247, 213, 29] https://rektdie.pythonanywhere.com/test/4426/ New net 8 king input buckets training tweaks Improved search too, see below. Engine can now run on multiple threads. Thanks to every rektbencher and @JonathanHallstrom for training nets for me! v.4.1: Fixed crashes on Windows and during SMP games. Eleanor 3.0 vs other engines: Cinder 0.4.0 1/4 -2 4 games C4ke 2.0 2/3 +1 3 games Reckless 0.9.0 dev-c5af2cea 1.5/3 +0 3 games Tcheran 9.0 1/3 -1 3 games Chessnix 1.2 2/2 +2 2 games Critter 1.6a 2/2 +2 2 games Grail 1.0.0 2/2 +2 2 games Knightx 4.7 2/2 +2 2 games Cwtch 4 1.5/2 +1 2 games Prelude 2.1 1.5/2 +1 2 games Prune 3.0.0 1.5/2 +1 2 games Leptir TI MPV 1/2 +0 2 games Caissa 1.24 1/2 +0 2...

Eleanor - a chess engine written in C++ Author: Mark ( rektdie) Eleanor Chess Engine Eleanor 4.0 what's new? Tested against Eleanor v3.0 LTC - 8 moves Elo   | 92.46 +- 10.54 (95%) Conf  | 40.0+0.40s Threads=1 Hash=64MB Games | N: 1000 W: 285 L: 25 D: 690 Penta | [0, 11, 247, 213, 29] https://rektdie.pythonanywhere.com/test/4426/ New net 8 king input buckets training tweaks Improved search too, see below. Engine can now run on multiple threads. Thanks to every rektbencher and @JonathanHallstrom for training nets for me! Eleanor 3.0 vs other engines: Cinder 0.4.0 1/4 -2 4 games C4ke 2.0 2/3 +1 3 games Reckless 0.9.0 dev-c5af2cea 1.5/3 +0 3 games Tcheran 9.0 1/3 -1 3 games Chessnix 1.2 2/2 +2 2 games Critter 1.6a 2/2 +2 2 games Grail 1.0.0 2/2 +2 2 games Knightx 4.7 2/2 +2 2 games Cwtch 4 1.5/2 +1 2 games Prelude 2.1 1.5/2 +1 2 games Prune 3.0.0 1.5/2 +1 2 games Leptir TI MPV 1/2 +0 2 games Caissa 1.24 1/2 +0 2 games Halogen 15.26.0 0.5/2 -1 2 games Caissa 1.24 JA...

Eleanor - a chess engine written in C++ Author: Mark ( rektdie) Eleanor Chess Engine Eleanor 3.0 what's new? New net HL size increased to 1536 Horizontal mirroring Fine tuning Also many search patches. New arch being: (768 -> 1024)x2 -> 1x8 Tests of this engine version: Tested against Eleanor v2.0 LTC - 8 moves Elo   | 121.41 +- 7.78 (95%) Conf  | 40.0+0.40s Threads=1 Hash=512MB Games | N: 3016 W: 1162 L: 149 D: 1705 Penta | [0, 82, 543, 671, 212] Eleanor 2.0 vs other engines: Eleanor 2.0 +49 159 Games Critter 1.6a +3 8 Games Alexandria 8.1.2 -5 7 Games Caissa 1.23 -5 7 Games Bread Engine 1.6.0 +3 5 Games Eubos 4.1 JA +4 4 Games Senpai 2.0 JA +3 4 Games Laser 1.8 beta JA +1 4 Games Fire 10 mingw -1 4 Games Stockfish dev-20250824 -2 4 Games Claw 1.0-M -2 4 Games Viridithas 18.0.0 -3 4 Games Stockfish dev-20250824 Ivec -3 4 Games Cinder 0.3.1 -3 4 Games Halogen 14.17.0 -4 4 Games Tactical Titan v4 -4 4 Games Pawnocchio 1.8.1 -4 4 Games Artemis 17.9TR sl -4 ...

The final group of the E08 Chess League Qualifiers has concluded. A total of 244 engines were tested in eight amateur groups and new engine versions. Add to that 64 engines in Leagues 1-3, bringing the total to 308 engines! Returning to the E08 group, the Eleanor 2.0 engine won. The engines that took 2nd-4th place also advanced to the higher group: Iris 2.0 , Anubis 3.01 JA , and Exocet 0.4.0 . A summary of the 06/2025 Season will be available soon on the website.   CEDR  736.088 games download   (01.09.2025) 💾  Tournament  download with 90 games 💻Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB  🖬 GUI-Aquarium 👍 #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" P Engine CEDR Score (Tie) Chg +/-/= 1: Eleanor 2.0 2400 7.5 / 9 52.0 +35 (+6 -0 =3) 2: Iris 2.0 2400 7.5 / 9 50.5 +35 (+7 -1 =1) 3: Anubis 3.01 JA 2400 6.5 / 9 50.0 ...

Eleanor - a chess engine written in C++ Author: Mark ( rektdie) Eleanor Chess Engine Eleanor 2.0 what's new? New Neural Net Increased the HL size to 1024 from 256 which resulted in ~440 elo tested on STC. Also datagen produces way better data. (will improve even further) New arch being: (768 -> 1024)x2 -> 1x8 Tests of this engine version: Tested against Stash v36.0 LTC - 8 moves: Elo   | -9.87 +- 10.86 (95%) Conf  | 40.0+0.40s Threads=1 Hash=64MB Games | N: 2008 W: 526 L: 583 D: 899 Penta | [71, 262, 390, 215, 66] Eleanor 1.0 JA vs other engines: Beast 3.2.2 4/4 +4 4 Games Aku 2025.30.5 JA 1/3 -1 3 Games Olithink 5.11.4 2/2 +2 2 Games Belofte 2.1.8 JA 2/2 +2 2 Games Tcheran 5.1 1.5/2 +1 2 Games Meltdown 1.7 1/2 +0 2 Games CalvinChess 6.1.1 JA 0.5/2 -1 2 Games Stockfish dev-20250602 0/2 -2 2 Games Bagatur 5.2a JA 0/2 -2 2 Games Berserk 20250606 JA 0/2 -2 2 Games SF PB 030625 0/2 -2 2 Games RukChess 4.1.0 0/2 -2 2 Games Clover 8.1.16 0/2 -2 2 Games RubiChes...

Here are 9 new versions of chess engines for Android. All of them are currently being tested by our testers - results coming soon. Chess engine for Android - Berserk 20250606 JA Rating CEDR=3498 Berserk 20250606 JA for Android download Chess engine for Android - Eleanor 1.0 JA Rating CEDR=??? Eleanor 1.0 JA for Android download Chess engine for Android - Koivisto 9.2 JA Rating CEDR=3385 Koivisto 9.2 JA for Android download Chess engine for Android - Shadowfax 1.0.1 JA Rating CEDR=??? Shadowfax 1.0.1 JA for Android download Chess engine for Android - Starzix 6.1 JA Rating CEDR=??? Starzix 6.1 JA for Android download Chess engine for Android - Stockfish 250525 Rating CEDR=3598 Stockfish 250525 for Android download Chess engine for Android - Tarnished 2.1 JA Rating CEDR=??? Tarnished 2.1 JAfor Android download Chess engine for Android - Turbulence 0.0.7 JA Rating CEDR=??? Turbulence 0.0.7 JA for Android download Chess engine for Android - Uralochka 3.42 ...

Eleanor - a chess engine written in C++ Author: Mark ( rektdie) Eleanor Chess Engine Search Features Negamax Quiescent Search Transposition Table Move Ordering (TT, SEE + MVV-LVA, Killers, History) Iterative Deepening Aspiration Windows Principal Variation Search Reverse Futility Pruning Improving Null Move Pruning Late Move Reductions Log formula Cutnode History Late Move Pruning Futility Pruning QS SEE Pruning PVS SEE Pruning Evaluation Eleanor uses a fully neural network-based evaluation function, entirely trained on self-play data from an initially simple HCE using the bullet trainer. Architecture: (768 -> 256)x2 -> 1x8 A basic 256-hidden-layer perspective net with 8 output buckets. The engine can be used in any GUI with UCI support. Eleanor 1.0 download