X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fnnue%2Fevaluate_nnue.cpp;h=4a3c206b8087fcb065ad0b9c4e595c68495701a8;hb=f193778446acc6e60d7f0f99c6eb01489f89e962;hp=e0d4b9117c707676e2300e5424503e8f27e59114;hpb=58054fd0fa6294510fc8cf76b0ba9673d5094c10;p=stockfish

diff --git a/src/nnue/evaluate_nnue.cpp b/src/nnue/evaluate_nnue.cpp
index e0d4b911..4a3c206b 100644
--- a/src/nnue/evaluate_nnue.cpp
+++ b/src/nnue/evaluate_nnue.cpp
@@ -35,7 +35,7 @@ namespace Stockfish::Eval::NNUE {
   LargePagePtr<FeatureTransformer> featureTransformer;
 
   // Evaluation function
-  AlignedPtr<Network> network;
+  AlignedPtr<Network> network[LayerStacks];
 
   // Evaluation function file name
   std::string fileName;
@@ -83,7 +83,8 @@ namespace Stockfish::Eval::NNUE {
   void initialize() {
 
     Detail::initialize(featureTransformer);
-    Detail::initialize(network);
+    for (std::size_t i = 0; i < LayerStacks; ++i)
+      Detail::initialize(network[i]);
   }
 
   // Read network header
@@ -92,7 +93,7 @@ namespace Stockfish::Eval::NNUE {
     std::uint32_t version, size;
 
     version     = read_little_endian<std::uint32_t>(stream);
-    *hashValue = read_little_endian<std::uint32_t>(stream);
+    *hashValue  = read_little_endian<std::uint32_t>(stream);
     size        = read_little_endian<std::uint32_t>(stream);
     if (!stream || version != Version) return false;
     desc->resize(size);
@@ -117,7 +118,8 @@ namespace Stockfish::Eval::NNUE {
     if (!read_header(stream, &hashValue, &netDescription)) return false;
     if (hashValue != HashValue) return false;
     if (!Detail::read_parameters(stream, *featureTransformer)) return false;
-    if (!Detail::read_parameters(stream, *network)) return false;
+    for (std::size_t i = 0; i < LayerStacks; ++i)
+      if (!Detail::read_parameters(stream, *(network[i]))) return false;
     return stream && stream.peek() == std::ios::traits_type::eof();
   }
 
@@ -126,12 +128,13 @@ namespace Stockfish::Eval::NNUE {
 
     if (!write_header(stream, HashValue, netDescription)) return false;
     if (!Detail::write_parameters(stream, *featureTransformer)) return false;
-    if (!Detail::write_parameters(stream, *network)) return false;
+    for (std::size_t i = 0; i < LayerStacks; ++i)
+      if (!Detail::write_parameters(stream, *(network[i]))) return false;
     return (bool)stream;
   }
 
   // Evaluation function. Perform differential calculation.
-  Value evaluate(const Position& pos) {
+  Value evaluate(const Position& pos, bool adjusted) {
 
     // We manually align the arrays on the stack because with gcc < 9.3
     // overaligning stack variables with alignas() doesn't work correctly.
@@ -154,10 +157,22 @@ namespace Stockfish::Eval::NNUE {
     ASSERT_ALIGNED(transformedFeatures, alignment);
     ASSERT_ALIGNED(buffer, alignment);
 
-    featureTransformer->transform(pos, transformedFeatures);
-    const auto output = network->propagate(transformedFeatures, buffer);
+    const std::size_t bucket = (pos.count<ALL_PIECES>() - 1) / 4;
+    const auto psqt = featureTransformer->transform(pos, transformedFeatures, bucket);
+    const auto output = network[bucket]->propagate(transformedFeatures, buffer);
 
-    return static_cast<Value>(output[0] / OutputScale);
+    int materialist = psqt;
+    int positional  = output[0];
+
+    int delta_npm = abs(pos.non_pawn_material(WHITE) - pos.non_pawn_material(BLACK));
+    int entertainment = (adjusted && delta_npm <= BishopValueMg - KnightValueMg ? 7 : 0);
+
+    int A = 128 - entertainment;
+    int B = 128 + entertainment;
+
+    int sum = (A * materialist + B * positional) / 128;
+
+    return static_cast<Value>( sum / OutputScale );
   }
 
   // Load eval, from a file stream or a memory stream