kate/BadFish
1
0
Fork 0
mirror of https://github.com/sockspls/badfish synced 2025-04-29 16:23:09 +00:00
Code Issues Releases Wiki Activity

Simplify material weights in evaluation

Browse source 
This patch uses the same material weights for the nnue
amplification term and the optimism term in evaluate().

STC:
LLR: 2.99 (-2.94,2.94) <-1.75,0.25>
Total: 83360 W: 21489 L: 21313 D: 40558
Ptnml(0-2): 303, 9934, 21056, 10058, 329
https://tests.stockfishchess.org/tests/view/664eee69928b1fb18de500d9

LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 192648 W: 48675 L: 48630 D: 95343
Ptnml(0-2): 82, 21484, 53161, 21501, 96
https://tests.stockfishchess.org/tests/view/664fa17aa86388d5e27d7d6e

closes https://github.com/official-stockfish/Stockfish/pull/5287

Bench: 1495602
This commit is contained in:
Stéphane Nicolet 2024-05-23 22:03:43 +02:00 • committed by Disservin
parent 61acbfc7d3
commit 4d876275cf
1 changed files with 4 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
src/evaluate.cpp
View file

@ -77,13 +77,10 @@ Value Eval::evaluate(const Eval::NNUE::Networks& networks,
optimism += optimism * nnueComplexity / 512;
nnue -= nnue * (nnueComplexity * 5 / 3) / 32082;
v = (nnue
* (32961 + 381 * pos.count<PAWN>() + 349 * pos.count<KNIGHT>()
+ 392 * pos.count<BISHOP>() + 649 * pos.count<ROOK>() + 1211 * pos.count<QUEEN>())
+ optimism
* (4835 + 136 * pos.count<PAWN>() + 375 * pos.count<KNIGHT>()
+ 403 * pos.count<BISHOP>() + 628 * pos.count<ROOK>() + 1124 * pos.count<QUEEN>()))
/ 36860;
int material = 200 * pos.count<PAWN>() + 350 * pos.count<KNIGHT>() + 400 * pos.count<BISHOP>()
+ 640 * pos.count<ROOK>() + 1200 * pos.count<QUEEN>();
v = (nnue * (34000 + material) + optimism * (4400 + material)) / 36860;
// Damp down the evaluation linearly when shuffling
v = v * (204 - pos.rule50_count()) / 208;