Update main network to nn-9a0cc2a62c52.nnue

network with new hash encoding.

closes https://github.com/official-stockfish/Stockfish/pull/6651

no functional change

src/evaluate.h

@@ -33,7 +33,7 @@ namespace Eval {
 // for the build process (profile-build and fishtest) to work. Do not change the
 // name of the macro or the location where this macro is defined, as it is used
 // in the Makefile/Fishtest.
-#define EvalFileDefaultNameBig "nn-5227780996d3.nnue"
+#define EvalFileDefaultNameBig "nn-9a0cc2a62c52.nnue"
 #define EvalFileDefaultNameSmall "nn-37f18f62d772.nnue"
 
 namespace NNUE {

src/nnue/nnue_feature_transformer.h

@@ -122,9 +122,20 @@ class FeatureTransformer {
 
     static constexpr auto InversePackusEpi16Order = invert_permutation(PackusEpi16Order);
 
+    static constexpr std::uint32_t combine_hash(std::initializer_list<std::uint32_t> hashes) {
+        std::uint32_t hash = 0;
+        for (const auto component_hash : hashes)
+        {
+            hash = (hash << 1) | (hash >> 31);
+            hash ^= component_hash;
+        }
+        return hash;
+    }
+
     // Hash value embedded in the evaluation file
     static constexpr std::uint32_t get_hash_value() {
-        return (UseThreats ? ThreatFeatureSet::HashValue : PSQFeatureSet::HashValue)
+        return (UseThreats ? combine_hash({ThreatFeatureSet::HashValue, PSQFeatureSet::HashValue})
+                           : PSQFeatureSet::HashValue)
              ^ (OutputDimensions * 2);
     }