11/09/2026

Version R 6.1.3

Windows 64bits:
- Version installable: InsLucasChessR6_1_3.exe
  - 300,483,540b - D9A797543543774118C76A6BA62A8D82AEC8EC5367BEC5D58A666A3DEE85190E
- Version portable: LucasChessR6_1_3.exe
  - 294,845,496b - F43FF1E6757B6A0AC62CE1428B3F20E7B2BDC84986FE92A1241C340C22D2CFA1
Linux 64bits:
- Version installable: LucasChessR6_1_3_LINUX.sh
  - 548,902,892b - D366BBF0163C5B1B4F5E43AEACA3B14FDE89D21ACE97B41EC5BA18EA7476726A
  - More info: Fresh News blog
- Version portable: LucasChessR6_1_3_LINUX.7z
  - 399,461,645b - D536E041050026A5398A720859622C90166BBF160DCCE9AEE421AFCA0E10F3E0
Shortcut:
- From version 6.1.0 or later, Information/Check for updates
Source/Downloads: GitHub

🌐Updated language Chinese by Zoushen.
🐞Databases, massive analysis, When the programme is closed, the workers remain active. Reported by Shahrad69
⇄ Databases, massive analysis, now include the option to select a single record. Reported by Shahrad69
🐞Board, When the size is changed, the pieces are positioned incorrectly or disappear. Reported by 10Pastore
🐞Tournaments, Workers, Information about the line generated by the engine is not displayed correctly. Reported by 10Pastore and Eric
🐞Playing against any engine, when the app asks you to answer a question (if you resign, for example), you can still move the pieces using the eboard. Reported by Graham O'Neill

🌐Hungarian Language, updated by József Oláh
🐞Blockages at Kibitzers. Reported by Diego V
🐞Databases, massive analysis, writes the accuracy into pgn label, but not into DB. The DB columns remain empty. Reported by Shahrad69

Updated Stockfish to version 19. In Linux needs glibc 2.35+.
Irina Engine: Fixed NpsLimit option, which affected some personalities in the Wicker Park Tourney. Reported by Bill P
Linux/Dragontooth Engine: Fixed Linux compatibility for Dragontooth engine. Reported by Ben H
STS (Linux): Fixed copy functionality not working.
External Engines: Added support for nodes, depth, and fixed time. Reported by JulioC

The time taken by the engine to analyse each movement was not being saved. Reported by Eric
Decimal Precision: Added an option in Configuration to choose between 1 or 2 decimal places (default: 2) for analysis. Reported by Landroni
Win/Draw/Loss Probability: added columns showing the probability of a win, draw or loss when displaying the analysis.
Analysis Bar: Fixed a freeze issue when quickly navigating between moves. Reported by Davide Nitti

LiChess Import: LiChess has changed the protocol for restoring player’s games; it now requires a simple personal access token, which can be obtained via the link shown on the import settings screen. Reported by Stefan and cmessoftware
Tactics Creation: Added the ability to set a maximum number of movements when creating tactics. Reported by Yasmine
Tactics Creation: option to overwrite the data of previous tactics with the same name has been added. Reported by Tommy Duggan
Massive Analysis: Corrected and improved. Reported by Shahrad C

The Grid: Adjusted Elo changes based on the number of games played, with larger initial jumps.
Learn from Games: added the possibility to delete comments. Reported by Качаев О.В.
Play Against Engine
- Select Opponent Move: option to change when playing in Config, now works with a small board. Reported by hazel
- Faster initial engine readout.

Utilities/Remove moves by percentage, it has been added to not only delete the move with a percentage lower than that specified, but also to delete all responses to that move recursively.
Export/Polyglot book, removed the possibility of duplicate keys. Reported by Eric

Piece Animation: a further attempt to improve the animation of pieces. Reported by medwatt
GUI Startup Time: Reduced GUI startup time.

MacOS Support: Adapted code for MacOS compatibility. Aported by Johannes Bolzano and jbh4x82

Previous releases

Lucas Chess