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Simplification in evaluate_nnue.cpp

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Removes the test on non-pawn-material before applying the positional/materialistic bonus.

Passed STC:
LLR: 2.94 (-2.94,2.94) <-2.25,0.25>
Total: 46904 W: 12197 L: 12059 D: 22648
Ptnml(0-2): 170, 5243, 12479, 5399, 161
https://tests.stockfishchess.org/tests/view/61be57cf57a0d0f327c3999d

Passed LTC:
LLR: 2.95 (-2.94,2.94) <-2.25,0.25>
Total: 18760 W: 4958 L: 4790 D: 9012
Ptnml(0-2): 14, 1942, 5301, 2108, 15
https://tests.stockfishchess.org/tests/view/61bed1fb57a0d0f327c3afa9

closes https://github.com/official-stockfish/Stockfish/pull/3866

Bench: 4826206
This commit is contained in:
Stéphane Nicolet 2021-12-19 15:15:30 +01:00 • committed by Joost VandeVondele
parent ca51b45649
commit 74776dbcd5
1 changed files with 4 additions and 5 deletions
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5
src/nnue/evaluate_nnue.cpp
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@ -165,9 +165,8 @@ namespace Stockfish::Eval::NNUE {
const auto psqt = featureTransformer->transform(pos, transformedFeatures, bucket); const auto psqt = featureTransformer->transform(pos, transformedFeatures, bucket);
const auto positional = network[bucket]->propagate(transformedFeatures, buffer)[0]; const auto positional = network[bucket]->propagate(transformedFeatures, buffer)[0];
// Give more value to positional evaluation when material is balanced // Give more value to positional evaluation when adjusted flag is set
if ( adjusted if (adjusted)
&& abs(pos.non_pawn_material(WHITE) - pos.non_pawn_material(BLACK)) <= RookValueMg - BishopValueMg)
return static_cast<Value>(((128 - delta) * psqt + (128 + delta) * positional) / 128 / OutputScale); return static_cast<Value>(((128 - delta) * psqt + (128 + delta) * positional) / 128 / OutputScale);
else else
return static_cast<Value>((psqt + positional) / OutputScale); return static_cast<Value>((psqt + positional) / OutputScale);