From: Marco Costalba <mcostalba@gmail.com>
Date: Mon, 28 Dec 2015 12:14:49 +0000 (+0100)
Subject: Fix assert with very high score position
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=3e4fed3a91752da394f7c912f4e5e29dc39391f6;ds=sidebyside

Fix assert with very high score position

In case of a very high material score, we can
overflow VALUE_INFINITE.

This patch fixes an assert with:

position fen 7k/QQQQR3/2B5/4KN1Q/3QQ3/8/8/4R3 b - - 0 1
go depth 1

No functional change.

Resolves #546
---

diff --git a/src/endgame.cpp b/src/endgame.cpp
index b64b3d1b..681b290c 100644
--- a/src/endgame.cpp
+++ b/src/endgame.cpp
@@ -163,7 +163,7 @@ Value Endgame<KXK>::operator()(const Position& pos) const {
       ||(pos.count<BISHOP>(strongSide) && pos.count<KNIGHT>(strongSide))
       ||(pos.count<BISHOP>(strongSide) > 1 && opposite_colors(pos.squares<BISHOP>(strongSide)[0],
                                                               pos.squares<BISHOP>(strongSide)[1])))
-      result += VALUE_KNOWN_WIN;
+      result = std::min(result + VALUE_KNOWN_WIN, VALUE_MATE_IN_MAX_PLY - 1);
 
   return strongSide == pos.side_to_move() ? result : -result;
 }