X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=src%2Fmovepick.cpp;h=95bbddba670788af7d2b937a72ddb4c28a791a31;hb=32934c0c8d75fe63e08046f6ba7dd546de67dc01;hp=d4242a300de7620e5f58665cb20c7e5ff0aa102c;hpb=cff3a6d33e50d37322ffae511ddbe4c7e846505e;p=stockfish

diff --git a/src/movepick.cpp b/src/movepick.cpp
index d4242a30..95bbddba 100644
--- a/src/movepick.cpp
+++ b/src/movepick.cpp
@@ -228,18 +228,29 @@ void MovePicker::score_captures() {
   // to the badCaptures[] array.
   Move m;
   int seeValue;
+  Square from, to;
 
   for (int i = 0; i < numOfMoves; i++)
   {
       m = moves[i].move;
-      seeValue = pos.see(m);
+      from = move_from(m);
+      to = move_to(m);
+
+      bool hxl = ( int(pos.midgame_value_of_piece_on(from))
+                  -int(pos.midgame_value_of_piece_on(to)) > 0)
+                || pos.type_of_piece_on(from) == KING;
+
+      // Avoid calling see() for LxH and equal captures because
+      // SEE is always >= 0 and we order for MVV/LVA anyway.
+      seeValue = (hxl ? pos.see(m) : 0);
+
       if (seeValue >= 0)
       {
           if (move_promotion(m))
               moves[i].score = QueenValueMidgame;
           else
-              moves[i].score = int(pos.midgame_value_of_piece_on(move_to(m)))
-                              -int(pos.type_of_piece_on(move_from(m)));
+              moves[i].score = int(pos.midgame_value_of_piece_on(to))
+                              -int(pos.type_of_piece_on(from));
       }
       else
       {