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⚖ Allow bucketed PSQTs + implement friendly king related PSQTs (king/queenside) #873

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merged 6 commits into from
Jul 30, 2024

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@eduherminio eduherminio commented Jul 30, 2024

  • Allow bucketed PSQTs, with a constant (PSQTBucketCount) that determines the number of buckets/PSQT instances per conceptual PSQT.
    They're short[PSQTBucketCount][64] now, with PackedPSQT being short[2][12][64] (candidate for flattenning?)
  • Make PSQTBucketCount = 2 and split PSQTs according to friendly king in kingside or queenside of the board.

Heavy tuner work needed: lynx-chess/texel-tuner@afb7539

Test  | eval/friendly-king-related-psqts
Elo   | 20.87 +- 7.72 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=32MB
LLR   | 2.90 (-2.25, 2.89) [0.00, 3.00]
Games | 4516: +1613 -1342 =1561
Penta | [156, 459, 852, 540, 251]
https://openbench.lynx-chess.com/test/500/

@eduherminio eduherminio marked this pull request as ready for review July 30, 2024 00:47
@eduherminio eduherminio merged commit f5a2260 into main Jul 30, 2024
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@eduherminio eduherminio deleted the eval/friendly-king-related-psqts branch July 30, 2024 00:47
eduherminio added a commit to lynx-chess/texel-tuner that referenced this pull request Jul 30, 2024
…buckets: king located in kingside/queenside

- Add option to include all output in the steps
- Remove other engines from compilation
lynx-chess/Lynx#873
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