Hydra 1.1.1 - new version chess engine

-

Hydra - UCI-compatible chess engine written in pure Python — no C extensions, no numpy, no external dependencies.
Estimated strength: ~2000 Elo (Stockfish UCI_Elo calibration, 100 ms/move).
Author: Miloslav Macůrek

Hydra 1.1.1 what's new?
Mate-search correctness release.

Fixed
Hydra no longer stops iterative deepening at the first forced mate it finds unless it is already mate-in-1.
Mate-like previous scores now disable aspiration windows, allowing deeper iterations to find shorter mating lines instead of staying trapped around an earlier mate score.
Added regression coverage to ensure iterative deepening continues after a forced mate score.


Comments

Post a Comment

Popular posts from this blog

We already have the new Fritz 20 program - what does it look like and how does it work?

-
Image
The purchase process for the download version on the ChessBase website took only 5 minutes. Downloading the files from the cloud was even quicker. The installation itself, which involved five large files, took maybe 7 minutes, including restarting the system and entering the serial number I received upon purchase. The start image for Fritz 20 has a strange mosaic of colors; perhaps I'll get used to it. As you can see in the second screenshot, the program interface hasn't changed much; only the icons are different (we've been using Fritz 17 until now). It looks nice, but it's no major revolution. The next two screenshots show engine management and the installation of the UCI chess engine (here, Cataphract 1.1). As you can see, there are no changes. Screenshot no. 5 shows the analysis of some position by Fritz 20 engines. The changes are minimal - it is still very legible. Finally, on screen 6 we have the engine tournament table generated by Fritz 20 . I think it is sti...
Read more

Stockfish 250702 wins Android Chess Engines Tournament, 2025.08.03-04

-
Image
Stockfish 250702 won the tournament for new versions of chess engines for Android. Rubichess 20250606 JA came in second, and CorChess 250618 came in third. Further testing will begin today. 🕓 Time 3' 💻Tablet - Smasung Galaxy TAB S6 Lite, 4GB RAM 💾  90 games from the tournament download    🖬 GUI-Chess Tournament for Android, Country - Poland, City -  Malbork 💾 All CEDR games for Android  24.494 games download  (3')  P Engine CEDR Score (Tie) Chg +/-/= 1: Stockfish 250702 3598 15.0 / 18 112.75 -5 (+12 -0 =6) 2: Rubichess 20250606 JA 3350 14.0 / 18 103.50 +11 (+11 -1 =6) 3: CorChess 250618 3574 12.0 / 18 96.50 -32 (+9 -3 =6) 4: Saturn 1.3 JA 2400 12.0 / 18 84.00 +77 (+9 -3 =6) 5: Frozenight 7.00 JA 3218 10.5 / 18 77.00 -11 (+8 -5 =5) 6: Marvin 6.3.0 JA 3267 8.5 / 18 47.00 ...
Read more