Simplify Incremental Updates

xu-shawn · Disservin · commit 93f2d14d95ca · 2025-11-30T21:43:54.000+01:00
Passed Non-regression STC: LLR: 3.03 (-2.94,2.94) <-1.75,0.25> Total: 277856 W: 71575 L: 71611 D: 134670 Ptnml(0-2): 842, 30719, 75836, 30695, 836 https://tests.stockfishchess.org/tests/view/69169dc17ca8781852331d76 Supersedes #6430 closes #6434 No functional change
diff --git a/src/nnue/nnue_accumulator.cpp b/src/nnue/nnue_accumulator.cpp
@@ -584,18 +584,6 @@ void update_accumulator_incremental(
     else
         FeatureSet::append_changed_indices(perspective, ksq, computed.diff, added, removed);
 
-    if (!added.size() && !removed.size())
-    {
-        auto&       targetAcc = target_state.template acc<TransformedFeatureDimensions>();
-        const auto& sourceAcc = computed.template acc<TransformedFeatureDimensions>();
-
-        targetAcc.accumulation[perspective]     = sourceAcc.accumulation[perspective];
-        targetAcc.psqtAccumulation[perspective] = sourceAcc.psqtAccumulation[perspective];
-        targetAcc.computed[perspective]         = true;
-
-        return;
-    }
-
     auto updateContext =
       make_accumulator_update_context(perspective, featureTransformer, computed, target_state);
 
