From: Marco Costalba <mcostalba@gmail.com>
Date: Wed, 8 May 2013 21:02:08 +0000 (+0200)
Subject: Merge 'passed_pawns' tweaks
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=02606a8c8360782c5c14e6a76fd7867f2cb9552d;hp=653c0527a70c3a134983519a1cf13ffbde120205

Merge 'passed_pawns' tweaks

Good at both short and long TC

15+0.05
LLR: 2.96 (-2.94,2.94)
Total: 28220 W: 5531 L: 5349 D: 17340

TC 60+0.05
LLR: 2.95 (-2.94,2.94)
Total: 12612 W: 2221 L: 2057 D: 8334

bench: 4857939
---

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index c2f025fc..94ec2b6c 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -677,8 +677,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
     Score score = SCORE_ZERO;
 
     // Undefended minors get penalized even if not under attack
-    undefendedMinors =  pos.pieces(Them)
-                      & (pos.pieces(BISHOP) | pos.pieces(KNIGHT))
+    undefendedMinors =  pos.pieces(Them, BISHOP, KNIGHT)
                       & ~ei.attackedBy[Them][ALL_PIECES];
 
     if (undefendedMinors)