From c90279e156ec78d2ae2fcd6f49bf0f90cf02a084 Mon Sep 17 00:00:00 2001
From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Sun, 8 May 2022 21:57:18 +0200
Subject: [PATCH] Fix stalemate value in MCTS (#4015)

---
 src/search.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/search.cpp b/src/search.cpp
index 5fa2a5ac..09031a2f 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -2795,7 +2795,7 @@ namespace Search
       Value terminal_value(Position& pos) const {
 
         if (MoveList<LEGAL>(pos).size() == 0)
-          return pos.checkers() ? VALUE_MATE : -VALUE_MATE;;
+          return pos.checkers() ? VALUE_MATE : VALUE_DRAW;
 
         if (ply >= MAX_PLY - 2 || pos.is_draw(ply - 1))
           return VALUE_DRAW;