Introduce trained PSQT depending on king position #12
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Bench: 2169197
Bench: 2169197
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This patch introduces PSQ tables dependent on the attacking/defending king position. Similarly to regular PSQ tables, these can be efficiently updated for most moves, and only need to be recomputed from scratch after a king move. The king's position is encoded in a mirrored fashion.
The current table has been trained from a dataset of roughly 8M games at depth 6 (generated using the branch
data_gen).The default table is embedded in the binary using incbin.
STC: LLR: 2.94/2.94<0.00, 6.00> Elo diff: 70.84 [52.71, 89.35] (95%)
Games: 728 W: 271 L: 124 D: 333 Draw ratio: 45.7%
Pntl: [10, 57, 117, 135, 44]
LTC: LLR: 2.95/2.94<0.00, 6.00> Elo diff: 87.82 [69.86, 106.26] (95%)
Games: 608 W: 227 L: 76 D: 305 Draw ratio: 50.2%
Pntl: [2, 35, 113, 117, 36]
Closes #12
Bench: 2169197