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⚖️ Custom PQST buckets: tweak in kingside corner - #2667

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eval/psqt-buckets-kingside-corner
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⚖️ Custom PQST buckets: tweak in kingside corner#2667
eduherminio wants to merge 1 commit into
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eval/psqt-buckets-kingside-corner

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@eduherminio

@eduherminio eduherminio commented Aug 25, 2026

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     15, 16, 17, 18, 19, 20, 21, 22,
     15, 8, 9, 10, 11, 12, 13, 14,
     15, 8, 9, 10, 11, 12, 13, 14,
-    0, 8, 9, 10, 11, 12, 13, 14,
+    15, 8, 9, 10, 11, 12, 13, 14,
     0, 1, 2, 3, 4, 5, 6, 7, //
 };

Opposite of #2665, align with #2666 in the idea of keeping corners with independent buckets

Test  | eval/psqt-buckets-kingside-corner
Elo   | -0.47 +- 2.01 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=32MB
LLR   | -2.26 (-2.25, 2.89) [0.00, 3.00]
Games | 39592: +10044 -10097 =19451
Penta | [513, 4792, 9244, 4729, 518]
https://openbench.lynx-chess.com/test/3040/

```diff
     15, 16, 17, 18, 19, 20, 21, 22,
     15, 8, 9, 10, 11, 12, 13, 14,
     15, 8, 9, 10, 11, 12, 13, 14,
-    0, 8, 9, 10, 11, 12, 13, 14,
+    15, 8, 9, 10, 11, 12, 13, 14,
     0, 1, 2, 3, 4, 5, 6, 7, //
 };
```
@eduherminio
eduherminio deleted the eval/psqt-buckets-kingside-corner branch August 25, 2026 22:05
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