From 7bb14c2489a3a3d3b30f6a60d6337ac9d8523d74 Mon Sep 17 00:00:00 2001
From: Dariusz Orzechowski <dariusz.orzechowski@gmail.com>
Date: Mon, 27 Jul 2020 23:14:51 +0200
Subject: [PATCH] Clamp NNUE evaluation score

No functional change.
---
 src/nnue/evaluate_nnue.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/nnue/evaluate_nnue.cpp b/src/nnue/evaluate_nnue.cpp
index 8807f3e8..799a551a 100644
--- a/src/nnue/evaluate_nnue.cpp
+++ b/src/nnue/evaluate_nnue.cpp
@@ -152,7 +152,10 @@ namespace Eval::NNUE {
 
   // Evaluation function. Perform differential calculation.
   Value evaluate(const Position& pos) {
-    return ComputeScore(pos, false);
+    Value v = ComputeScore(pos, false);
+    v = Utility::clamp(v, VALUE_TB_LOSS_IN_MAX_PLY + 1, VALUE_TB_WIN_IN_MAX_PLY - 1);
+
+    return v;
   }
 
   // Evaluation function. Perform full calculation.