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Tune a few NNUE related scaling parameters

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passed STC
LLR: 2.94 (-2.94,2.94) <0.00,2.50>
Total: 102480 W: 26099 L: 25708 D: 50673
Ptnml(0-2): 282, 11637, 27003, 12044, 274
https://tests.stockfishchess.org/tests/view/618820e3d7a085ad008ef1dd

passed LTC
LLR: 2.93 (-2.94,2.94) <0.50,3.00>
Total: 165512 W: 41689 L: 41112 D: 82711
Ptnml(0-2): 82, 17255, 47510, 17822, 87
https://tests.stockfishchess.org/tests/view/6188b470d7a085ad008ef239

closes https://github.com/official-stockfish/Stockfish/pull/3784

Bench: 6339548
This commit is contained in:
Joost VandeVondele 2021-11-07 14:42:46 +01:00 • committed by Stéphane Nicolet
parent c4a1390f4e
commit 1a5c21dc56
1 changed files with 4 additions and 4 deletions
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8
src/evaluate.cpp
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@ -1091,9 +1091,9 @@ Value Eval::evaluate(const Position& pos) {
v = Evaluation<NO_TRACE>(pos).value(); // classical v = Evaluation<NO_TRACE>(pos).value(); // classical
else else
{ {
int scale = 883 int scale = 898
+ 32 * pos.count<PAWN>() + 24 * pos.count<PAWN>()
+ 32 * pos.non_pawn_material() / 1024; + 33 * pos.non_pawn_material() / 1024;
v = NNUE::evaluate(pos, true) * scale / 1024; // NNUE v = NNUE::evaluate(pos, true) * scale / 1024; // NNUE
@ -1102,7 +1102,7 @@ Value Eval::evaluate(const Position& pos) {
} }
// Damp down the evaluation linearly when shuffling // Damp down the evaluation linearly when shuffling
v = v * (100 - pos.rule50_count()) / 100; v = v * (207 - pos.rule50_count()) / 207;
// Guarantee evaluation does not hit the tablebase range // Guarantee evaluation does not hit the tablebase range
v = std::clamp(v, VALUE_TB_LOSS_IN_MAX_PLY + 1, VALUE_TB_WIN_IN_MAX_PLY - 1); v = std::clamp(v, VALUE_TB_LOSS_IN_MAX_PLY + 1, VALUE_TB_WIN_IN_MAX_PLY - 1);