From: Reuven Peleg <reuvenpe2005@gmail.com>
Date: Mon, 22 Jul 2013 10:47:59 +0000 (+0300)
Subject: Better condition in is_pseudo_legal()
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=1cc18d8a7af5af3a83b95034edab679942c54e4d

Better condition in is_pseudo_legal()

Simplify occupied destination condition.

No functional change.

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

diff --git a/src/position.cpp b/src/position.cpp
index 55f8bcff..f7a89e07 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -542,7 +542,7 @@ bool Position::is_pseudo_legal(const Move m) const {
       return false;
 
   // The destination square cannot be occupied by a friendly piece
-  if (piece_on(to) != NO_PIECE && color_of(piece_on(to)) == us)
+  if (pieces(us) & to)
       return false;
 
   // Handle the special case of a pawn move