X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fsearch.cpp;h=dcfb7d46aff3177d95fba2c1cfdc7e13f6ea922e;hb=a2e924039bb96c0b923512dbb6903de9bb6bbd21;hp=37793d607e98e2f6e3b4254533a8da4bfa20e64f;hpb=33bd67e052e26079cbb7e5e03c93f518f25701c3;p=stockfish

diff --git a/src/search.cpp b/src/search.cpp
index 37793d60..dcfb7d46 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -871,8 +871,8 @@ namespace {
         search<PvNode>(pos, ss, alpha, beta, d);
         ss->skipNullMove = false;
 
-        ttMove = ss->bestMove;
         tte = TT.probe(posKey);
+        ttMove = tte ? tte->move() : MOVE_NONE;
     }
 
 split_point_start: // At split points actual search starts from here
@@ -885,8 +885,7 @@ split_point_start: // At split points actual search starts from here
     singularExtensionNode =   !Root
                            && !SpNode
                            && depth >= SingularExtensionDepth[PvNode]
-                           && tte
-                           && tte->move()
+                           && ttMove != MOVE_NONE
                            && !excludedMove // Do not allow recursive singular extension search
                            && (tte->type() & VALUE_TYPE_LOWER)
                            && tte->depth() >= depth - 3 * ONE_PLY;
@@ -938,7 +937,7 @@ split_point_start: // At split points actual search starts from here
       // At Root and at first iteration do a PV search on all the moves to score root moves
       isPvMove = (PvNode && moveCount <= (Root ? depth <= ONE_PLY ? 1000 : MultiPV : 1));
       givesCheck = pos.move_gives_check(move, ci);
-      captureOrPromotion = pos.move_is_capture_or_promotion(move);
+      captureOrPromotion = pos.move_is_capture(move) || move_is_promotion(move);
 
       // Step 11. Decide the new search depth
       ext = extension<PvNode>(pos, move, captureOrPromotion, givesCheck, &dangerous);
@@ -949,7 +948,7 @@ split_point_start: // At split points actual search starts from here
       // on all the other moves but the ttMove, if result is lower than ttValue minus
       // a margin then we extend ttMove.
       if (   singularExtensionNode
-          && move == tte->move()
+          && move == ttMove
           && ext < ONE_PLY)
       {
           Value ttValue = value_from_tt(tte->value(), ss->ply);
@@ -1067,7 +1066,6 @@ split_point_start: // At split points actual search starts from here
               ss->reduction = reduction<PvNode>(depth, moveCount);
               if (ss->reduction)
               {
-                  alpha = SpNode ? sp->alpha : alpha;
                   Depth d = newDepth - ss->reduction;
                   value = -search<NonPV>(pos, ss+1, -(alpha+1), -alpha, d);
 
@@ -1217,7 +1215,8 @@ split_point_start: // At split points actual search starts from here
 
         // Update killers and history only for non capture moves that fails high
         if (    bestValue >= beta
-            && !pos.move_is_capture_or_promotion(move))
+            && !pos.move_is_capture(move)
+            && !move_is_promotion(move))
         {
             if (move != ss->killers[0])
             {
@@ -1385,7 +1384,8 @@ split_point_start: // At split points actual search starts from here
           && !inCheck
           &&  givesCheck
           &&  move != ttMove
-          && !pos.move_is_capture_or_promotion(move)
+          && !pos.move_is_capture(move)
+          && !move_is_promotion(move)
           &&  ss->eval + PawnValueMidgame / 4 < beta
           && !check_is_dangerous(pos, move, futilityBase, beta, &bestValue))
       {
@@ -1628,7 +1628,7 @@ split_point_start: // At split points actual search starts from here
     assert(move_is_ok(m));
     assert(threat && move_is_ok(threat));
     assert(!pos.move_gives_check(m));
-    assert(!pos.move_is_capture_or_promotion(m));
+    assert(!pos.move_is_capture(m) && !move_is_promotion(m));
     assert(!pos.move_is_passed_pawn_push(m));
 
     Square mfrom, mto, tfrom, tto;