From c93f8732bfcdebcb23518c3ffe58ce9a5356cfac Mon Sep 17 00:00:00 2001
From: Tomasz Sobczyk <tomasz.sobczyk1997@gmail.com>
Date: Fri, 16 Oct 2020 19:40:05 +0200
Subject: [PATCH] Force Use NNUE to pure when learning.

---
 src/learn/learn.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/learn/learn.cpp b/src/learn/learn.cpp
index a0a8ec07..95cbe4bb 100644
--- a/src/learn/learn.cpp
+++ b/src/learn/learn.cpp
@@ -1685,7 +1685,6 @@ namespace Learner
             else if (option == "seed") is >> seed;
             else if (option == "set_recommended_uci_options")
             {
-                UCI::setoption("Use NNUE", "pure");
                 UCI::setoption("MultiPV", "1");
                 UCI::setoption("Contempt", "0");
                 UCI::setoption("Skill Level", "20");
@@ -1907,6 +1906,9 @@ namespace Learner
             sr.read_validation_set(validation_set_file_name, eval_limit);
         }
 
+        cout << "Forcing Use NNUE pure.\n";
+        UCI::setoption("Use NNUE", "pure");
+
         Eval::NNUE::verify_any_net_loaded();
 
         // Calculate rmse once at this point (timing of 0 sfen)