From faa587af362b4c455d2dcab6b085b0cd121d5454 Mon Sep 17 00:00:00 2001
From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Wed, 15 Jan 2020 21:06:22 +0100
Subject: [PATCH] Fix Tsume mode speed regression

---
 src/position.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/position.cpp b/src/position.cpp
index 63e37df..9d4575d 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -1927,7 +1927,7 @@ bool Position::is_immediate_game_end(Value& result, int ply) const {
       }
   }
   // Tsume mode: Assume that side with king wins when not in check
-  if (Options["TsumeMode"] && count<KING>(sideToMove) && !checkers())
+  if (!count<KING>(~sideToMove) && count<KING>(sideToMove) && !checkers() && Options["TsumeMode"])
   {
       result = mate_in(ply);
       return true;
-- 
1.7.0.4