Simplify Queen Mobility

[stockfish] / src / evaluate.cpp

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 2414d5a0932771196e6000c46769cf8734208f1e..9e0629ef66686f816cc81041f801ebc3feb52829 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -292,11 +292,6 @@ namespace {
             ei.kingAdjacentZoneAttacksCount[Us] += popcount(b & ei.attackedBy[Them][KING]);
         }
 
-        if (Pt == QUEEN)
-            b &= ~(  ei.attackedBy[Them][KNIGHT]
-                   | ei.attackedBy[Them][BISHOP]
-                   | ei.attackedBy[Them][ROOK]);
-
         int mob = popcount(b & ei.mobilityArea[Us]);
 
         mobility[Us] += MobilityBonus[Pt][mob];