Inanis 1.2.0 released

Another major update of the Inanis chess engine: better Syzygy support, performance and stability improvement.

Strength: 2850 Elo, Link: https://github.com/Tearth/Inanis/releases/tag/v1.2.0

Changelog

• Added integration with Fathom library to better support Syzygy tablebases
• Added “tbhits” to the search output
• Added “avg_game_phase” parameter to “tunerset” command
• Added “syzygy” and “bindgen” as switchable Cargo features
• Added information about captures, en passants, castles, promotions and checks in perft’s output
• Added attackers/defenders cache
• Added killer moves as separate move generator phase
• Removed unnecessary check detection in null move pruning
• Removed redundant abort flag check
• Removed underpromotions in qsearch
• Reduced binary size by removing dependencies and replacing them with custom implementation
• Renamed “test” command to “testset”
• Simplified evaluation by reducing the number of score taperings
• Improved build process
• Improved benchmark output
• Improved allocation of all hashtables, now their size will always be a power of 2 for better performance
• Improved king safety evaluation by taking a number of attacked adjacent fields more serious
• Improved overall performance by a lot of minor refactors and adjustments
• Improved game phase evaluation
• Improved killer heuristic
• Improved history table aging
• Improved reduction formula in null move pruning
• Fixed a few “tunerset” command bugs related to the game phase
• Fixed PGN parser when there were no spaces between dots and moves
• Fixed invalid evaluation of doubled passing pawns
• Fixed invalid cut-offs statistics
• Fixed qsearch failing hard instead of failing soft

History version