Chess Engines Diary

The next Tournament of Strong Chess Engines was a closely contested event. Four engines: ShashChess 39, DarkSeid 6.5 EE, DarkZoryn 2.0 , and Tactical Titan v3 , tied for first place, and the standings were decided by secondary scoring.   CEDR  705.417 games download   (01.08.2025) 💾  Tournament  download with 612 games 💻Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB  🖬 GUI-Lucas Chess 👍 #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" P Engine CEDR Score (Tie) Chg +/-/= 1: ShashChess 39 3758 36.5 / 68 1230.50 -20 (+5 -0 =63) 2: DarkSeid 6.5 EE 3753 36.5 / 68 1228.25 -14 (+5 -0 =63) 3: DarkZoryn 2.0 3750 36.5 / 68 1227.75 -14 (+5 -0 =63) 4: Tactical Titan v3 3759 36.5 / 68 1222.75 -20 (+5 -0 =63) 5: Claw 1.0-M 3750 36.0 / 68 1217.00 ...

A major tournament of new chess engine versions - 1680 games. Stockfish dev-20250824 won, Tactical Titan v4 came in second, and DarkSeid 6.5 EE came in third. Alexandria 8.1.2 achieved a good result.   CEDR  705.417 games download   (01.08.2025) 💾  Tournament  download with 1680 games 💻HP ENVY i5-8250U 8GB RAM  🖬 GUI-Lucas Chess 👍 #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" P Engine CEDR Score (Tie) Chg +/-/= 1: Stockfish dev-20250824 3759 111.0/160 7681.75 -48 (+62 -0 =98) 2: Tactical Titan v4 3755 111.0/160 7553.00 -32 (+62 -0 =98) 3: DarkSeid 6.5 EE 3749 110.5/160 7520.00 -32 (+61 -0 =99) 4: SF-POLY 200825 3750 110.0/160 7559.75 -32 (+60 -0 =100) 5: Artemis 17.9TR_sl 3754 109.5/160 7536.00 ...

Quirky -  Quirky is a simple chess engine, supporting UCI protocol. Approximate CCRL 40/15 rating is around 3350. The engine requires AVX2/BMI2 support to run, so make sure your processor supports these instruction sets. Author: Anton Kernozhitsky Quirky vs other engines: Bread Engine 1.4.0 11/14 +8 14 Games Knightx 4.4 8.5/14 +3 14 Games Tarnished 2.0 4/14 -6 14 Games Leorik 3.1.3 JA 1.5/14 -11 14 Games Calvin 6.1.0 JA 1.5/14 -11 14 Games Renegade 1.2.0 0.5/14 -13 14 Games Illumina 3 0/14 -14 14 Games Prophet 4.4 JA 11/12 +10 12 Games Kobra 2.0 JA 9.5/12 +7 12 Games Zangdar 3.09.01 JA 1/12 -10 12 Games Pawn 4.0 0.5/12 -11 12 Games Astra 5.2 0/12 -12 12 Games Baislicka 1.0 JA 3/3 +3 3 Games Rodent IV 0.33 JA 1/3 -1 3 Games Eubos 4.0 2/2 +2 2 Games Halcyon 1 JA 2/2 +2 2 Games Thorshammer 3.01 JA 2/2 +2 2 Games Qapla 0.3.1 1.5/2 +1 2 Games Spaghet BologNNese 1.1.3 JA 1/2 +0 2 Games Olithink 5.11.2 1/2 +0 2 Games Critter 1.6a 1/2 +0 2 Games Quirky 2.0 download

Zangdar -  UCI chess engine (written in C++11). Rating Chess Engines Diary CEDR=2962 Zangdar 4.04.01 - what's new? Zangdar crashed when the Hash Size was changed to the same value. Thanks to Frank Quisinsky for pointing this bug :) Zangdar 4.04 JA vs other engines: Fire 9.3 JA 5/10 +0 10 Games Stormphrax 7.0.0 2/10 -6 10 Games Fridolin 4.00 JA 8/8 +8 8 Games PlentyChess 6.0.5 JA 2.5/8 -3 8 Games Freda 1.1 JA 6/6 +6 6 Games Maelstrom v2.1.0 6/6 +6 6 Games Meltdown 1.8 JA 6/6 +6 6 Games Halogen 13.0.1 3/6 +0 6 Games DarkSeid 6.2 EE 1.5/6 -3 6 Games Stockfish 17.1 1.5/6 -3 6 Games Fire 10 1.5/6 -3 6 Games DarkSeid 6.1 1.5/6 -3 6 Games Artemis 16TR 1.5/5 -2 5 Games Yuliirma 5.0 1.5/4 -1 4 Games Artemis 17TR 1/4 -2 4 Games Uralochka 3.42 dev13 1/4 -2 4 Games Obsidian dev-16.08 1/4 -2 4 Games RubiChess 20250606 JA 1/4 -2 4 Games Rustyrook 110 JA 2/2 +2 2 Games Freda 1.1 2/2 +2 2 Games Emerald 0.3.0 JA 2/2 +2 2 Games Zangdar 4.04.01 download from page Successes of the Zangdar engine in o...

Weak chess engine - new chess engine Author: Dragjon LTC Progtest against Tarnished v2.0 Elo   | -123.81 +- 18.17 (95%) Conf  | 40.0+0.40s Threads=1 Hash=32MB Games | N: 1000 W: 206 L: 548 D: 246 Penta | [136, 137, 169, 49, 9] Jim Ablett compiles: Weak chess engine 1.0.0 JA download

  Artemis 17.9TR sl won the elite chess engine tournament, followed by DarkSeid 6.5 EE in second place and Stockfish 15.1 in third. Stockfish 15.1's result deserves special attention; it shows that even with numerous new trial versions and the work of many "developers," its playing strength hasn't improved much. CEDR  705.417 games download   (01.08.2025) 💾  Tournament  download with 544 games 💻Dell G15 SE, i7-11800H RAM 16,0 GB  🖬 GUI-Fritz 17 👍 #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" P Engine Score (Tie) +/-/= 1: Artemis 17.9TR sl 35.0 / 64 1079.25 (+6 -0 =58) 2: DarkSeid 6.5 EE 35.0 / 64 1065.75 (+6 -0 =58) 3: Stockfish 15.1 35.0 / 64 1065.50 (+6 -0 =58) 4: Stockfish dev-20250824 35.0 / 64 1064.50 (+6 -0 =58) 5: Artemis 17.8TR sl 34.5 ...

PZChessBot 3.0 won the sixth group – E06, the qualifying round for amateurs and new versions of chess engines. In addition to the winner, the engines ranked 2nd-4th – Seagull 1.0 JA, Hardfiskur rev 98eab6f JA , and Byte-knight 3.0.0 – advanced to the next group. The bottom four engines in the table were relegated to the next group.   CEDR  705.417 games download   (01.08.2025) 💾  Tournament  download with 144 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: PZChessBot 3.0 2400 8.5 / 9 50.0 +36 (+8 -0 =1) 2: Seagull 1.0 JA 2400 7.5 / 9 48.5 +30 (+7 -1 =1) 3: Hardfiskur rev 98eab6f JA 2400 6.0 / 9 51.0 +14 (+5 -2 =2) 4: Byte-knight 3.0.0 2400 6.0 / 9 47.5 +14 (+5 -...

Claw  - new chess engine by Solista (Stockfish derivatives) Author: Claw 2.0-M by Solista. This engine is based on modified SF dev code from August 24, 2025. The playstyle is now significantly more active than in Claw 1.0-M. Random Op is implemented. Multi-variant mode allows for even more activity by increasing the number of variants in the ENG options. However, only one variant is preset – for the strongest play. Features: Slow Mover, Minimum Thinking Time. The calculated move appears on the display after 5 seconds. Claw 2.0-M download Solista homepage:https://solistachess.jimdosite.com/bilder/

Another major tournament of the best chess engines – 1,224 games. The winner was the Spirit 100825 engine. The engines DarkZoryn 2.0, Artemis 17.8TR sl , and Stockfish-sfmodjo 1.0 shared 2nd-4th places. The Halogen 14.16.1 engine also performed well.   CEDR  705.417 games download   (01.08.2025) 💾  Tournament  download with 1224 games 💻HP ENVY i5-8250U 8GB RAM  🖬 GUI-Lucas Chess 👍 #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" P Engine CEDR Score (Tie) Chg +/-/= 1: Spirit 100825 3750 71.5 / 136 4810.00 -14 (+7 -0 =129) 2-4: DarkZoryn 2.0 3745 71.0 / 136 4787.00 -14 (+6 -0 =130) 2-4: Artemis 17.8TR sl 3754 71.0 / 136 4787.00 -27 (+6 -0 =130) 2-4: Stockfish-sfmodjo 1.0 3759 71.0 / 136 4787.00 -41 (+6 -0 =130) 5-6: StockfishMZ 180825 3...