Robert Nurnberg 9b92ada935 Base WDL model on material count and normalize evals dynamically ... This PR proposes to change the parameter dependence of Stockfish's internal WDL model from full move counter to material count. In addition it ensures that an evaluation of 100 centipawns always corresponds to a 50% win probability at fishtest LTC, whereas for master this holds only at move number 32. See also https://github.com/official-stockfish/Stockfish/pull/4920 and the discussion therein. The new model was fitted based on about 340M positions extracted from 5.6M fishtest LTC games from the last three weeks, involving SF versions from e67cc979fd (SF 16.1) to current master. The involved commands are for [WDL_model](https://github.com/official-stockfish/WDL_model) are: ``` ./updateWDL.sh --firstrev e67cc979fd python scoreWDL.py updateWDL.json --plot save --pgnName update_material.png --momType "material" --momTarget 58 --materialMin 10 --modelFitting optimizeProbability ``` The anchor `58` for the material count value was chosen to be as close as possible to the observed average material count of fishtest LTC games at move 32 (`43`), while not changing the value of `NormalizeToPawnValue` compared to the move-based WDL model by more than 1. The patch only affects the displayed cp and wdl values. closes https://github.com/official-stockfish/Stockfish/pull/5121 No functional change		2024-03-20 16:29:35 +01:00
..
features	Update copyright year	2024-01-04 15:47:10 +01:00
layers	Remove some outdated SIMD functions	2024-01-17 18:04:29 +01:00
network.cpp	Fix Raspberry Pi Compilation	2024-03-12 19:09:50 +01:00
network.h	Fix Raspberry Pi Compilation	2024-03-12 19:09:50 +01:00
nnue_accumulator.h	Only evaluate the PSQT part of the small net for large evals.	2024-03-03 15:29:58 +01:00
nnue_architecture.h	Refactor Network Usage	2024-03-12 16:41:08 +01:00
nnue_common.h	Update copyright year	2024-01-04 15:47:10 +01:00
nnue_feature_transformer.h	Only evaluate the PSQT part of the small net for large evals.	2024-03-03 15:29:58 +01:00
nnue_misc.cpp	Base WDL model on material count and normalize evals dynamically	2024-03-20 16:29:35 +01:00
nnue_misc.h	Refactor Network Usage	2024-03-12 16:41:08 +01:00