King mobility in danger

bench: 4420341
pb00068 · May 16, 2018 · e49f3ee · e49f3ee
1 parent aacee91
commit e49f3ee
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/evaluate.cpp b/src/evaluate.cpp
@@ -485,6 +485,12 @@ namespace {
         if (kingDanger > 0)
         {
             int mobilityDanger = mg_value(mobility[Them] - mobility[Us]);
+            b1 = attackedBy[Us][KING] & ~attackedBy[Them][ALL_PIECES] & ~pos.pieces();
+            if (!b1)
+            	kingDanger = (kingDanger * 14) / 10;
+            else if (!more_than_one(b1))
+            	kingDanger = (kingDanger * 12) / 10;
+
             kingDanger = std::max(0, kingDanger + mobilityDanger);
             score -= make_score(kingDanger * kingDanger / 4096, kingDanger / 16);
         }