Inanis 1.1.0 released

Major update of the Inanis chess engine, introducing a lot of new features and improvements: Syzygy tablebases, MultiPV, adjusted evaluation and more. Full changelog below.

Strength: 2800 Elo, Link: https://github.com/Tearth/Inanis/releases/tag/v1.1.0

Changelog

• Added support for Syzygy tablebases
• Added support for “MultiPV” UCI option
• Added support for “searchmoves” in “go” UCI command
• Added “hashfull” in the UCI search output
• Added “tunerset” command
• Added “transposition_table_size” and “threads_count” parameters to “test” command
• Added instant move when there is only one possible in the position
• Added new benchmarks
• Added tuner dataset generator
• Added information about the compiler and a list of target features at the startup
• Added diagnostic mode in search functions to gather statistics only if necessary
• Added a simple PGN parser
• Removed “tries_to_confirm” parameter from “test” command
• Removed arr_macro crate from dependencies
• Improved mobility evaluation, now the parameters are defined per piece instead of one value for all
• Improved null move reduction formula, now should be more aggressive
• Improved null move pruning, now it shouldn’t be tried for hopeless positions
• Improved make-undo scheme performance
• Improved release script, now it’s shorter and more flexible
• Improved error messages and made them more detailed
• Improved repetition draw detection
• Increased late move pruning max depth
• Increased amount of memory allocated for pawn hashtable
• Adjusted evaluation parameters
• Made LMR less aggressive in PV nodes
• Made aging in the transposition table faster and more reliable
• Merged reduction pruning with late move pruning
• Decreased memory usage during tuner work
• Deferred evaluation of evasion mask
• Reduced amount of lazy evaluations
• Reduced amount of locks in the UCI interface
• Removed duplicated search calls in the PVS framework
• Fixed crash when “tuner” command had not enough parameters
• Fixed crash when FEN didn’t have information about halfmove clock and move number
• Fixed crash when search in ponder mode was trying to be started in already checkmated position
• Fixed tuner and tester not being able to examine all positions when multithreading is enabled
• Fixed draw detection issue caused by transposition table
• Fixed undefined behaviors and reduced the amount of unsafe code
• Fixed incorrect benchmark statistics
• Fixed a few edge cases in the short algebraic notation parser

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