From 91cb4a6770fee0f8e586c3df5fd31f0f22dc7018 Mon Sep 17 00:00:00 2001
From: noobpwnftw <guo.bojun@gmail.com>
Date: Sat, 3 Oct 2020 15:35:54 +0800
Subject: [PATCH] Skip eval dampening in Use NNUE = pure case

---
 src/evaluate.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 607ff7eb..b3894fe8 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -996,6 +996,11 @@ Value Eval::evaluate(const Position& pos) {
 
   if (Eval::useNNUE == UseNNUEMode::Pure) {
       v = NNUE::evaluate(pos);
+
+      // Guarantee evaluation does not hit the tablebase range
+      v = std::clamp(v, VALUE_TB_LOSS_IN_MAX_PLY + 1, VALUE_TB_WIN_IN_MAX_PLY - 1);
+
+      return v;
   }
   else if (Eval::useNNUE == UseNNUEMode::False)
       v = Evaluation<NO_TRACE>(pos).value();