Chess Engines Diary

Another version of a very powerful chess engine has appeared, which wants to beat Stockfish. We are very happy about this - we will do the first tests of this version of the engine for you soon. Caissa - UCI chess engine,  Author: Michał Witanowski Rating Chess Engines Diary CEDR=3709 v.1.22: Caissa just got a little smarter and a lot more fun - especially in strange “queens-only” or "rook-only" setups, where it now crushes Stockfish and beats its own previous version by +500 Elo. Changes Tweaked how deep singular extensions go. Added extra negative extensions. Late-move reductions (LMR) are now fully deterministic. Quiescence search now averages stand-pat scores. Time-manager tweaks. Transposition table clears faster on multi-core CPUs. Fresh neural net trained on 15B positions. Special sauce In positions with only queens on the first rank (e.g. qqqqkqqq/pppppppp/8/8/8/8/PPPPPPPP/QQQQKQQQ w - - 0 1) Caissa 1.22 gains a massive +500 Elo over 1.21, putting it far ahead of Sto...

We've just launched a new MEGA drive for our sponsors! We are incredibly grateful for your crucial support. Your contributions are essential for the development of 'Chess Engines Diary' and enable us to keep delivering new content to you. Look: New Bonus Rules from the Chess Diary MEGA Dysk - update 30.04 .2025   (15 files added) Engines for Windows: (13 files):  Astra 5.1.1, Baislicka 1.0 Dev.2dae4e5 JA, EveAnn 3.1, Fisherov 0.98e, Minic 3.43 JA, Obsidian 15.17, Parakeet 1.0 JA, Pawnocchio 1.6, SF-PB 280425, Shallow Guess 0.4.0, Stockfish dev-20250426, Thor's Hammer 3.0 JA, Thor's Hammer 3.01 JA. MacOS (2 files): Pawnocchio 1.6,  Sapling 1.2.6. --- Engines for Android (0 files):---  ---- Book and NNUE (0 files):--- --- Games (0 file): --- . --- GUI (0 files): --- --- How to become a sponsor: -  here

The 1st League of Elite Chess Engines (TOP-64) has ended. The Stockfish 17.1 engine won, the silver medal went to Dragon 3.3 and the third place went to Obsidian dev-15.14 . The next tournaments are ongoing - results soon. All CEDR  625.428 games download  (01.04.2025)  💾  240 games from the tournament download 👍 @chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3"  💻Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB 🖬 GUI-Fritz 17 P Engine Score (Tie) +/-/= 1: Stockfish 17.1 18.5 / 30 271.25 (+7 -0 =23) 2: Dragon 3.3 16.5 / 30 241.00 (+4 -1 =25) 3: Obsidian dev-15.14 16.0 / 30 239.00 (+2 -0 =28) 4: Lc0 0.31.2 16.0 / 30 235.25 (+3 -1 =26) 5: Alexandria 8.0.0 15.5 / 30 231.50 (+1 -0 =29) 6: Viridithas 17.0....