Partially restore HistoryMax

[stockfish] / src / movepick.cpp

diff --git a/src/movepick.cpp b/src/movepick.cpp
index e3cc1880ce55cd5902b5c86e9f38ad8f3fc77ab0..aa6f7c19bc9ac9aa45b5368133d7010f155f32ee 100644 (file)
--- a/src/movepick.cpp
+++ b/src/movepick.cpp
@@ -75,7 +75,7 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const History& h,
   int searchTT = ttm;
   ttMoves[0].move = ttm;
   badCaptureThreshold = 0;
-  lastBadCapture = badCaptures;
+  badCaptures = moves + MOVES_MAX;
 
   pinned = p.pinned_pieces(pos.side_to_move());
 
@@ -90,7 +90,7 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const History& h,
 
   if (p.is_check())
       phasePtr = EvasionsPhaseTable;
-  else if (d > Depth(0))
+  else if (d > DEPTH_ZERO)
   {
       // Consider sligtly negative captures as good if at low
       // depth and far from beta.
@@ -99,7 +99,7 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const History& h,
 
       phasePtr = MainSearchPhaseTable;
   }
-  else if (d == Depth(0))
+  else if (d >= DEPTH_QS_CHECKS)
       phasePtr = QsearchWithChecksPhaseTable;
   else
   {
@@ -132,7 +132,7 @@ void MovePicker::go_next_phase() {
       return;
 
   case PH_GOOD_CAPTURES:
-      lastMove = generate_captures(pos, moves);
+      lastMove = generate<MV_CAPTURE>(pos, moves);
       score_captures();
       return;
 
@@ -142,32 +142,31 @@ void MovePicker::go_next_phase() {
       return;
 
   case PH_NONCAPTURES:
-      lastMove = generate_noncaptures(pos, moves);
+      lastMove = generate<MV_NON_CAPTURE>(pos, moves);
       score_noncaptures();
       sort_moves(moves, lastMove, &lastGoodNonCapture);
       return;
 
   case PH_BAD_CAPTURES:
-      // Bad captures SEE value is already calculated so just sort them
-      // to get SEE move ordering.
+      // Bad captures SEE value is already calculated so just pick
+      // them in order to get SEE move ordering.
       curMove = badCaptures;
-      lastMove = lastBadCapture;
+      lastMove = moves + MOVES_MAX;
       return;
 
   case PH_EVASIONS:
       assert(pos.is_check());
-      lastMove = generate_evasions(pos, moves);
-      score_evasions_or_checks();
+      lastMove = generate<MV_EVASION>(pos, moves);
+      score_evasions();
       return;
 
   case PH_QCAPTURES:
-      lastMove = generate_captures(pos, moves);
+      lastMove = generate<MV_CAPTURE>(pos, moves);
       score_captures();
       return;
 
   case PH_QCHECKS:
-      lastMove = generate_non_capture_checks(pos, moves);
-      score_evasions_or_checks();
+      lastMove = generate<MV_NON_CAPTURE_CHECK>(pos, moves);
       return;
 
   case PH_STOP:
@@ -232,7 +231,7 @@ void MovePicker::score_noncaptures() {
   }
 }
 
-void MovePicker::score_evasions_or_checks() {
+void MovePicker::score_evasions() {
   // Try good captures ordered by MVV/LVA, then non-captures if
   // destination square is not under attack, ordered by history
   // value, and at the end bad-captures and non-captures with a
@@ -248,10 +247,10 @@ void MovePicker::score_evasions_or_checks() {
   {
       m = cur->move;
       if ((seeScore = pos.see_sign(m)) < 0)
-          cur->score = seeScore - HistoryMax; // Be sure are at the bottom
+          cur->score = seeScore - History::MaxValue; // Be sure we are at the bottom
       else if (pos.move_is_capture(m))
           cur->score =  pos.midgame_value_of_piece_on(move_to(m))
-                      - pos.type_of_piece_on(move_from(m)) + HistoryMax;
+                      - pos.type_of_piece_on(move_from(m)) + History::MaxValue;
       else
           cur->score = H.value(pos.piece_on(move_from(m)), move_to(m));
   }
@@ -293,12 +292,10 @@ Move MovePicker::get_next_move() {
                   if (seeValue >= badCaptureThreshold)
                       return move;
 
-                  // Losing capture, move it to the badCaptures[] array, note
+                  // Losing capture, move it to the tail of the array, note
                   // that move has now been already checked for legality.
-                  assert(int(lastBadCapture - badCaptures) < 63);
-                  lastBadCapture->move = move;
-                  lastBadCapture->score = seeValue;
-                  lastBadCapture++;
+                  (--badCaptures)->move = move;
+                  badCaptures->score = seeValue;
               }
               break;
 
@@ -316,7 +313,7 @@ Move MovePicker::get_next_move() {
 
               // Sort negative scored moves only when we get there
               if (curMove == lastGoodNonCapture)
-                  insertion_sort(lastGoodNonCapture, lastMove);
+                  insertion_sort<MoveStack>(lastGoodNonCapture, lastMove);
 
               move = (curMove++)->move;
               if (   move != ttMoves[0].move