Less threat in defended squares

MJZ1977 · May 15, 2018 · 05ef14e · 05ef14e
1 parent aacee91
commit 05ef14e
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/evaluate.cpp b/src/evaluate.cpp
@@ -546,7 +546,7 @@ namespace {
             Square s = pop_lsb(&b);
             score += ThreatByMinor[type_of(pos.piece_on(s))];
             if (type_of(pos.piece_on(s)) != PAWN)
-                score += ThreatByRank * (int)relative_rank(Them, s);
+                score += ThreatByRank * (int)relative_rank(Them, s) / (weak & s ? 1 : 2);
         }
 
         b = (pos.pieces(Them, QUEEN) | weak) & attackedBy[Us][ROOK];
@@ -555,7 +555,7 @@ namespace {
             Square s = pop_lsb(&b);
             score += ThreatByRook[type_of(pos.piece_on(s))];
             if (type_of(pos.piece_on(s)) != PAWN)
-                score += ThreatByRank * (int)relative_rank(Them, s);
+                score += ThreatByRank * (int)relative_rank(Them, s) / (weak & s ? 1 : 2);
         }
 
         b = weak & attackedBy[Us][KING];