From: Marco Costalba <mcostalba@gmail.com>
Date: Tue, 6 Jan 2009 15:10:22 +0000 (+0100)
Subject: Fix a small bug in rook pawn evaluation
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=9b87d151bcdda4c8992f97582b974dc7c4c84686

Fix a small bug in rook pawn evaluation

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 2bfe5238..4b98a13c 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -1018,8 +1018,8 @@ namespace {
             // value if the other side has a rook or queen.
             if (square_file(s) == FILE_A || square_file(s) == FILE_H)
             {
-                if(   pos.non_pawn_material(them) == KnightValueMidgame // FIXME should be <= ???
-                   && pos.piece_count(them, KNIGHT) == 1)
+                if(   pos.non_pawn_material(them) <= KnightValueMidgame
+                   && pos.piece_count(them, KNIGHT) <= 1)
                     ebonus += ebonus / 4;
                 else if(pos.rooks_and_queens(them))
                     ebonus -= ebonus / 4;