X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmovepick.cpp;h=f7b7f42673d2a0405580848faa25845ed3a010c5;hp=1f4ef1952d0a0c469ba654f31512c3c3966e7712;hb=2ca142a5b4ca200c56cb99495ec51a804983d07d;hpb=0dc6f16992c7e682be4be89123cdc5f6fb307606

diff --git a/src/movepick.cpp b/src/movepick.cpp
index 1f4ef195..f7b7f426 100644
--- a/src/movepick.cpp
+++ b/src/movepick.cpp
@@ -55,7 +55,7 @@ namespace {
   inline Move pick_best(ExtMove* begin, ExtMove* end)
   {
       std::swap(*begin, *std::max_element(begin, end));
-      return begin->move;
+      return *begin;
   }
 
 } // namespace
@@ -67,14 +67,13 @@ namespace {
 /// search captures, promotions and some checks) and how important good move
 /// ordering is at the current node.
 
-MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const HistoryStats& h,
-                       Move* cm, Move* fm, Search::Stack* s) : pos(p), history(h), depth(d) {
+MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const HistoryStats& h, const CounterMovesHistoryStats& cmh,
+                       Move cm, Search::Stack* s) : pos(p), history(h), counterMovesHistory(cmh), depth(d) {
 
   assert(d > DEPTH_ZERO);
 
   endBadCaptures = moves + MAX_MOVES - 1;
-  countermoves = cm;
-  followupmoves = fm;
+  countermove = cm;
   ss = s;
 
   if (pos.checkers())
@@ -87,8 +86,8 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const HistoryStats&
   endMoves += (ttMove != MOVE_NONE);
 }
 
-MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const HistoryStats& h,
-                       Square s) : pos(p), history(h) {
+MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const HistoryStats& h, const CounterMovesHistoryStats& cmh,
+                       Square s) : pos(p), history(h), counterMovesHistory(cmh) {
 
   assert(d <= DEPTH_ZERO);
 
@@ -112,8 +111,8 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const HistoryStats&
   endMoves += (ttMove != MOVE_NONE);
 }
 
-MovePicker::MovePicker(const Position& p, Move ttm, const HistoryStats& h, PieceType pt)
-                       : pos(p), history(h) {
+MovePicker::MovePicker(const Position& p, Move ttm, const HistoryStats& h, const CounterMovesHistoryStats& cmh, PieceType pt)
+                       : pos(p), history(h), counterMovesHistory(cmh) {
 
   assert(!pos.checkers());
 
@@ -162,8 +161,13 @@ void MovePicker::score<CAPTURES>() {
 
 template<>
 void MovePicker::score<QUIETS>() {
+
+  Square prevSq = to_sq((ss-1)->currentMove);
+  const HistoryStats& cmh = counterMovesHistory[pos.piece_on(prevSq)][prevSq];
+
   for (auto& m : *this)
-      m.value = history[pos.moved_piece(m)][to_sq(m)];
+      m.value =  history[pos.moved_piece(m)][to_sq(m)]
+               + cmh[pos.moved_piece(m)][to_sq(m)];
 }
 
 template<>
@@ -203,26 +207,14 @@ void MovePicker::generate_next_stage() {
       cur = killers;
       endMoves = cur + 2;
 
-      killers[0].move = ss->killers[0];
-      killers[1].move = ss->killers[1];
-      killers[2].move = killers[3].move = MOVE_NONE;
-      killers[4].move = killers[5].move = MOVE_NONE;
-
-      // In SMP case countermoves[] and followupmoves[] could have duplicated entries
-      // in rare cases (less than 1 out of a million). This is harmless.
-
-      // Be sure countermoves and followupmoves are different from killers
-      for (int i = 0; i < 2; ++i)
-          if (   countermoves[i] != killers[0].move
-              && countermoves[i] != killers[1].move)
-              (endMoves++)->move = countermoves[i];
-
-      for (int i = 0; i < 2; ++i)
-          if (   followupmoves[i] != killers[0].move
-              && followupmoves[i] != killers[1].move
-              && followupmoves[i] != killers[2].move
-              && followupmoves[i] != killers[3].move)
-              (endMoves++)->move = followupmoves[i];
+      killers[0] = ss->killers[0];
+      killers[1] = ss->killers[1];
+      killers[2].move = MOVE_NONE;
+
+      // Be sure countermoves are different from killers
+      if (   countermove != killers[0]
+          && countermove != killers[1])
+          *endMoves++ = countermove;
       break;
 
   case QUIETS_1_S1:
@@ -260,7 +252,7 @@ void MovePicker::generate_next_stage() {
       /* Fall through */
 
   case STOP:
-      endMoves = cur + 1; // Avoid another next_phase() call
+      endMoves = cur + 1; // Avoid another generate_next_stage() call
       break;
 
   default:
@@ -297,7 +289,7 @@ Move MovePicker::next_move<false>() {
                   return move;
 
               // Losing capture, move it to the tail of the array
-              (endBadCaptures--)->move = move;
+              *endBadCaptures-- = move;
           }
           break;
 
@@ -313,12 +305,9 @@ Move MovePicker::next_move<false>() {
       case QUIETS_1_S1: case QUIETS_2_S1:
           move = *cur++;
           if (   move != ttMove
-              && move != killers[0].move
-              && move != killers[1].move
-              && move != killers[2].move
-              && move != killers[3].move
-              && move != killers[4].move
-              && move != killers[5].move)
+              && move != killers[0]
+              && move != killers[1]
+              && move != killers[2])
               return move;
           break;