X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=0261a481beb4c5f187e230384859ba92d9de4d47;hp=64e9028b10bd82fd1c7bc2d77e52bb960f17048f;hb=7396c08b795191d954528d687e84d7ff6dbe7a3b;hpb=85924db496af2fb8d70b6c89b17fc8541339ca19

diff --git a/src/search.cpp b/src/search.cpp
index 64e9028b..0261a481 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -213,6 +213,7 @@ void Search::clear() {
   {
       th->history.clear();
       th->counterMoves.clear();
+      th->fromTo.clear();
   }
 
   Threads.main()->previousScore = VALUE_INFINITE;
@@ -914,16 +915,16 @@ moves_loop: // When in check search starts from here
           if (moveCountPruning)
               continue;
 
+          predictedDepth = std::max(newDepth - reduction<PvNode>(improving, depth, moveCount), DEPTH_ZERO);
+
           // Countermoves based pruning
-          if (   depth <= 4 * ONE_PLY
+          if (   predictedDepth < 3 * ONE_PLY
               && move != ss->killers[0]
               && (!cmh  || (*cmh )[moved_piece][to_sq(move)] < VALUE_ZERO)
               && (!fmh  || (*fmh )[moved_piece][to_sq(move)] < VALUE_ZERO)
               && (!fmh2 || (*fmh2)[moved_piece][to_sq(move)] < VALUE_ZERO || (cmh && fmh)))
               continue;
 
-          predictedDepth = std::max(newDepth - reduction<PvNode>(improving, depth, moveCount), DEPTH_ZERO);
-
           // Futility pruning: parent node
           if (   predictedDepth < 7 * ONE_PLY
               && ss->staticEval + 256 + 200 * predictedDepth / ONE_PLY <= alpha)
@@ -967,7 +968,8 @@ moves_loop: // When in check search starts from here
           Value val = thisThread->history[moved_piece][to_sq(move)]
                      +    (cmh  ? (*cmh )[moved_piece][to_sq(move)] : VALUE_ZERO)
                      +    (fmh  ? (*fmh )[moved_piece][to_sq(move)] : VALUE_ZERO)
-                     +    (fmh2 ? (*fmh2)[moved_piece][to_sq(move)] : VALUE_ZERO);
+                     +    (fmh2 ? (*fmh2)[moved_piece][to_sq(move)] : VALUE_ZERO)
+                     +    thisThread->fromTo.get(~pos.side_to_move(), move);
 
           // Increase reduction for cut nodes
           if (cutNode)
@@ -1396,6 +1398,7 @@ moves_loop: // When in check search starts from here
         ss->killers[0] = move;
     }
 
+    Color c = pos.side_to_move();
     Value bonus = Value((depth / ONE_PLY) * (depth / ONE_PLY) + 2 * depth / ONE_PLY - 2);
 
     Square prevSq = to_sq((ss-1)->currentMove);
@@ -1405,6 +1408,7 @@ moves_loop: // When in check search starts from here
     Thread* thisThread = pos.this_thread();
 
     thisThread->history.update(pos.moved_piece(move), to_sq(move), bonus);
+    thisThread->fromTo.update(c, move, bonus);
 
     if (cmh)
     {
@@ -1422,6 +1426,7 @@ moves_loop: // When in check search starts from here
     for (int i = 0; i < quietsCnt; ++i)
     {
         thisThread->history.update(pos.moved_piece(quiets[i]), to_sq(quiets[i]), -bonus);
+        thisThread->fromTo.update(c, quiets[i], -bonus);
 
         if (cmh)
             cmh->update(pos.moved_piece(quiets[i]), to_sq(quiets[i]), -bonus);