Retire MovePicker::see_sign()

[stockfish] / src / evaluate.cpp

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 177d29345fa38613143630e7a01564f4ce58039b..259a5bc5b6086ae927c8bc77669e44b303f0dfd4 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -210,7 +210,7 @@ namespace {
   // in KingDanger[]. Various little "meta-bonuses" measuring the strength
   // of the enemy attack are added up into an integer, which is used as an
   // index to KingDanger[].
-  Score KingDanger[512];
+  Score KingDanger[400];
 
   // KingAttackWeights[PieceType] contains king attack weights by piece type
   const int KingAttackWeights[PIECE_TYPE_NB] = { 0, 0, 7, 5, 4, 1 };
@@ -360,7 +360,8 @@ namespace {
         if (Pt == QUEEN)
         {
             // Penalty if any relative pin or discovered attack against the queen
-            if (pos.slider_blockers(pos.pieces(Them, ROOK, BISHOP), s))
+            Bitboard pinners;
+            if (pos.slider_blockers(pos.pieces(Them, ROOK, BISHOP), s, pinners))
                 score -= WeakQueen;
         }
     }
@@ -706,9 +707,9 @@ namespace {
     // ...count safe + (behind & safe) with a single popcount
     int bonus = popcount((Us == WHITE ? safe << 32 : safe >> 32) | (behind & safe));
     bonus = std::min(16, bonus);
-    int weight = pos.count<ALL_PIECES>(Us);
+    int weight = pos.count<ALL_PIECES>(Us) - 2 * ei.pi->open_files();
 
-    return make_score(bonus * weight * weight / 22, 0);
+    return make_score(bonus * weight * weight / 18, 0);
   }
 
 
@@ -779,23 +780,22 @@ Value Eval::evaluate(const Position& pos) {
 
   assert(!pos.checkers());
 
+  Score mobility[COLOR_NB] = { SCORE_ZERO, SCORE_ZERO };
   EvalInfo ei;
-  Score score, mobility[COLOR_NB] = { SCORE_ZERO, SCORE_ZERO };
-
-  // Initialize score by reading the incrementally updated scores included in
-  // the position object (material + piece square tables). Score is computed
-  // internally from the white point of view.
-  score = pos.psq_score();
 
   // Probe the material hash table
   ei.me = Material::probe(pos);
-  score += ei.me->imbalance();
 
   // If we have a specialized evaluation function for the current material
   // configuration, call it and return.
   if (ei.me->specialized_eval_exists())
       return ei.me->evaluate(pos);
 
+  // Initialize score by reading the incrementally updated scores included in
+  // the position object (material + piece square tables) and the material
+  // imbalance. Score is computed internally from the white point of view.
+  Score score = pos.psq_score() + ei.me->imbalance();
+
   // Probe the pawn hash table
   ei.pi = Pawns::probe(pos);
   score += ei.pi->pawns_score();