Chess Engines Diary

  New Chess Engine Testing Policy (Starting Jan 1, 2026) As you’ve probably noticed, there’s been a flood of new chess engines lately, many of them AI-generated. It’s incredibly easy now—we’ve tested it ourselves and managed to build a basic engine in under three minutes. While these engines are quite primitive and lack significant playing strength, the sheer quantity of them is the problem. Testing hundreds or even thousands of such engines is no longer feasible. It would split the CEDR league into too many groups and stretch a single season out for months, which we want to avoid. Therefore, we are introducing new testing rules starting January 1, 2026. Here is a summary of the changes: CEDR Chess Engine League The league consists of 64 engines—mirroring the 64 squares of a chessboard. The competition is structured into four divisions: Leagues 1, 2, 3, and 4. A system of promotion and relegation will be applied at the end of each season. Top performers from the Qualifying Rounds w...

  DarkSeid 7.6 EE won another tournament of new versions of the strongest chess engines. Killfish PB 151025 took second place. Places 3-7 were shared by CorChess 20251130 , Obsidian dev-16.15 SE, DON dev-20251208, Stockfish dev-20251203 , and Esox .   CEDR   788.872 games download   (01.12.2025) 💾  Tournament  download with 480 games 💻 Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB  🖬 GUI - Aquarium #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" P Engine Score (Tie) +/-/= 1: DarkSeid 7.6 EE 31.5 / 60 936.75 (+3 -0 =57) 2: Killfish PB 151025 31.0 / 60 922.50 (+2 -0 =58) 3-7 CorChess 20251130 30.5 / 60 911.25 (+1 -0 =59) 3-7 Obsidian dev-16.15 SE 30.5 / 60 911.25 (+1 -0 =59) 3-7 DON dev-20251208 30.5 / 60 911.25 ...

PlentyChess Alamat 7.0.41 SE emerged victorious in a major master-level chess engine tournament after nearly 1,000 games. It was followed by Reckless 0.9.0 dev-0dd5b9ac in second place and Obsidian dev-16.15 SE in third. All three remain prominent examples of top-tier engines developed independently of Stockfish. CEDR   788.872 games download   (01.12.2025) 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"   Tournament  download with 990 games   #chessenginesdiary P Engine Score (Tie) +/-/= 1: PlentyChess Alamat 7.0.41 SE 92.5 / 165 7510.50 (+23 -3 =139) 2: Reckless 0.9.0 dev-0dd5b9ac 91.0 / 165 7406.25 (+18 -1 =146) 3: Obsidian dev-16.15 SE 88.5 / 165 7214.75 (+13 -1 =151) 4: Integral 7.0.0-dev JA 87.0 / 165 7118.50 ...

Raid - is a Stockfish derivative . Rating Chess Engines Diary CEDR=3753 Raid 4.0 T1000 SERIES what's new? Four BIN Books Place up to 4 .bin books inside the Raid folder- the engine will automatically detect and use them. Persistent Learning Improved learning system that saves knowledge across games for stronger long-term play. Two Play Styles (Strategies) o AggressiveStrategy (default: true) o PositionalStrategy (default: false) Important: Only one strategy can be active at a time. o If both are set to true, the engine will default to the last activated one. o Example: If Aggressive is already on and you enable Positional without disabling Aggressive, then Positional will override and be used. Raid 5.2 download    Raid 4.7 vs other engines: CorChess 20251005 15.5/30 +1 30 Games Artemis 18.7TR 15.5/30 +1 30 Games HypnoS 1.00 15/30 +0 30 Games Obsidian dev-16.15 SE 14/27 +1 27 Games JudaS 1.0.1 12/24 +0 24 Games Stockfish 17.1 12/24 +0 24 Games Omega Explorer 121025 12/24 +0 24...

DarkSeid 7.7 EE won the tournament for new versions of the most powerful chess engines. Esox II took second place, and DON dev-20251221 took third. The latest Arasan 25.3 made its debut in the tournament, and although it finished last, it managed to secure numerous draws against Stockfish clones.   CEDR   788.872 games download   (01.12.2025) 💾  Tournament  download with 84 games 💻 Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB  🖬 GUI - Aquarium #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" P Engine Score (Tie) +/-/= 1: DarkSeid 7.7 EE 8.0 / 14 53.75 (+2 -0 =12) 2: Esox II 7.5 / 14 52.25 (+1 -0 =13) 3: DON dev-20251221 7.5 / 14 51.25 (+1 -0 =13) 4: PlentyChess Alamat 7.0.41 SE 7.5 / 14 50.50 (+2 -1 =11) 5: Revolution 4.10-261225 7.0 / 14 49.00 (+0 -0 =14) 6: Artemis 24TR...

Cinder 0.4.1 won the Silicon Rising Tournament, which featured chess engines that placed in the fourth and fifth places in the Chess Engines Diary rankings. Peacekeeper 3.01 JA took second place, and Fire 10 took third.   CEDR   788.872 games download   (01.12.2025) 💾  Tournament  download with 84 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: Cinder 0.4.1 3651 14.5 / 24 168.25 +2 (+6 -1 =17) 2: Peacekeeper 3.01 JA 3607 12.0 / 24 143.75 -5 (+3 -3 =18) 3: Fire 10 3582 12.0 / 24 142.25 +7 (+3 -3 =18) 4: Koivisto 9.2 JA 3614 12.0 / 24 141.50 -7 (+4 -4 =16) 5: Revenge 4.0 3636 12.0 / 24 141.00 -14 (+2 -2 =20) 6: Alexander 7.0 3556 11.0 / 24 134.00 +7 (+2 -...

Dear readers and friends of the Chess Engines Diary Team, Today, we're pleased to announce another update to the MEGA disk . As a bonus for our supporters, we have added a total of 38 new files , including chess engines, opening books, and games. Look: New Bonus Rules from the Chess Diary MEGA Dysk - update 30.12 .2025   (38 files added) Engines for Windows: (31 files):  Agent-Smith 1.7z Arasan 25.3.7z Artemis 22TR PrO 221225.7z Artemis 23TR PrO 271225.7z Artemis 24TR_PrO.7z Bread Engine 2.1.1.7z DarkSeid 7.6 Elite Edition.7z DarkSeid 7.7 Elite Edition.7z Esox II.7z GC-Engine 1.0.7z Gnome 2025-05-14.7z JigSaw 7.00 SuPreme.7z Kreveta 2.2.0.7z Kreveta 2.2.1.7z Lunar-chess 0.3.6.7z Marvin 6.3.0 JA.7z Minke 4.0.0.7z Moodle 0.11.7z Petrel 3.2 JA.7z PlentyChess Alamat 7.0.41 SE.7z Plisco 1.0.1.7z Raid v5.2 T1000 SERIES.7z Raphael 2.0.0.7z Reckless 0.9.0 Dev.967b JA.7z Revolution 4.0-211225.7z Revolution 4.10-261225.7z RubiChess-231125.7z Rusty Rival 1.0.7.7z SF Ref 031225 PB.7z Tac...

Esox won the latest tournament for new chess engine versions. Artemis 22TR PrO took second place and Revolution 4.0 211225 took third.   CEDR   788.872 games download   (01.12.2025) 💾  Tournament  download with 180 games 💻 HP ENVY i5-8250U 8GB RAM  🖬 GUI - Fritz 17 👍 #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" P Engine Score (Tie) +/-/= 1: Esox 28.0 / 36 393.00 (+20 -0 =16) 2: Artemis 22TR PrO 27.0 / 36 379.50 (+18 -0 =18) 3: Revolution 4.0 211225 27.0 / 36 379.00 (+18 -0 =18) 4: JigSaw 7.00 SuPreme 27.0 / 36 378.50 (+18 -0 =18) 5: DarkSeid 7.6 EE 26.5 / 36 379.25 (+17 -0 =19) 6: Bread Engine 2.1.1 16.5 / 36 148.00 (+13 -16 =7) 7: Critter 1.6a 15.5 / 36 123.50 ...

Revolution - Revolution is a free, open-source UCI chess engine derived from Stockfish. Jorge Ruiz Centelles , with credit to ChatGPT, modifies and extends the code to explore new concepts. The engine implements cutting-edge search algorithms combined with neural network evaluation. Derived from fundamental chess programming principles, Revolution analyzes positions through parallelized alpha-beta search enhanced with null-move pruning and late move reductions. As a UCI-compliant engine, Revolution operates through standard chess interfaces without an integrated graphical interface. Users must employ compatible chess GUIs (Arena, Scid vs PC, etc.) for board visualization and move input. Consult your GUI documentation for implementation details. Revolution 3.80 021225 what's new? Summary   * Moved static evaluation, correction history adjustment, and improving/opponent-worsening calculations ahead of TT cutoffs, including the updated hindsight reduction threshold of 173 t...