Palamedes is a project dedicated to offering expert playing computer opponents at backgammon and several other variants. Currently users of Palamedes can play the variants Portes, Plakoto, Fevga collectively called Tavli (Greek backgammon) and Narde. For position evaluation, Palamedes uses neural networks trained by a form of temporal difference learning and millions of self-play games. Palamedes also offers simple ways of storing and loading games, as well as simple analyzing tools.
What's new in 0.55.0
Development: - Updated Qt to 6.9.2 Core: - Algorithms: added multithreading to NegaBatch and IDDFS search algorithms - Algorithms: removed stats.currentMove and added movesCompleted. This statistic is better suited for multi-threaded search GUI: - Start position can now be saved/loaded to/from .tavli files - Fixed visual glitches when AI has finished thinking before computer dice has finished animated - Added pips inside board - NeoAnalysis: user can expand multiple moves at once (with right click) - NeoAnalysis: fix boldness of Diff column - NeoAnalysis: board move is now added inside search and not expanded after analysis has finished - Advanced: removed old analysis window
Core: - Algorithms: added search for all rolls - Algorithms: added some optimizations for search, new map for NegaTTExpectimax (30% less memory, 15% faster) - Evaluators: added pubeval evaluator for portes/backgammon games GUI: - Fixed major bug in match play: match options were not applied - NeoAnalysis: all rolls of a position can now be analyzed and shown in a single table. Rolls are sorted by value and the weighted average is also calculated. - NeoAnalysis: removed bold column - NeoAnalysis: selected move can not be expanded if terminal - NeoAnalysis: the played move is now analyzed at the max-ply depth - Options: fixed dice tab
0.53.2Feb 24, 2025
New Features: - New game: switched to new search algortihms (IDDFS). Games can be played up to 4ply. - Options: added new filters, removed old AI search options - Options: AI resign thresholds now configurable - Analysis: added column "Diff" which showes the value differences from the best move. Thresholds and colors can be adjusted in options. - Analysis: added One-Sided PinDB Evaluator when applicable in plakoto positions Improvements: - Analysis: alternate row color in table is now a lighter gray - Board: Better positioning of the checker(s) on the bar (closer to board's center)
0.53.1Jan 29, 2025
New Features: - New form for analyzing positions! New features: - Analysis up to 5ply - Configurable match options - Configurable search algorithm - Dice roll can be changed - Moves can be selectively analyzed to deeper plies with a right-click. Bugfixes: - Backgammon: fixed score (3, -3) when losing player was on bar - Takhteh: Rule "No hit and run" fixed to "No hit and run for cover" - New game: fixed bug when selecting 2nd best NNs in a Tavli match General: - Added translations in some standard buttons - New game: default chance filter is now OneMove (1)
Other versions
0.47
Frequently asked questions
Is Palamedes free?
Yes, Palamedes is free to download and use on Windows.
What is the latest version of Palamedes?
The latest version is 0.55.0, released on Sep 1, 2025.
Is it safe to download Palamedes?
The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with beec84b24455988adec6093169fcf5036e75a079e3c03ac09215d1f12d464f80.
Which Windows versions does Palamedes support?
Palamedes runs on Windows and is available for 32-bit (x86) systems.
How do I install Palamedes silently?
Run the offline installer with "Palamedes_install_0.55.0.exe" /S, or install it with Windows Package Manager: winget install --id=nikpapa.palamedes -e --silent.
How do I uninstall Palamedes?
Open Settings › Apps › Installed apps, find Palamedes and select Uninstall. From the command line, run winget uninstall --id=nikpapa.palamedes -e.
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