Arasan 26.1 - new version chess engine (Windows, Android, Linux)
A new version of one of the longest-developed chess engines has been released - Arasan 26 JA . The engine plays very strongly and is ranked high at 41th place in the CEDR ranking. We will start the first tests of this engine soon. Arasan - UCI engines Author: Jon Dart Rating Chess Engines Diary CEDR=3739 Arasan has both a native user interface (for Windows only) and a console-based chess engine for use with Winboard or xboard. Arasan also works with Arena, another free chess interface, and with UCI-compatible programs like Fritz and Chessbase. Arasan includes an opening "book" with over 900,000 moves. Arasan - what's new? Changes in Arasan 26.1 (October 2026): Changes to futility margin calcuation Rework history heuristic and history pruning, retune Add some utility/tool programs: filter_pgn.py, bulletstats LMR changes and tuning with Lakas Fixes/enhancements to selfplay utility Scale eval by material level Stricter FEN parsing and error reporting Retrain network with 3-...