Copy killers in the movepicker

[stockfish] / src / movepick.cpp

diff --git a/src/movepick.cpp b/src/movepick.cpp
index 7fe8971b349ce7efeb41e021b93665571a482a7c..d0ea367a19e9bba7a64bafe1db06d88d6be30bc6 100644 (file)
--- a/src/movepick.cpp
+++ b/src/movepick.cpp
@@ -76,6 +76,8 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, Search::Stack* s)
 
   Square prevSq = to_sq((ss-1)->currentMove);
   countermove = pos.this_thread()->counterMoves[pos.piece_on(prevSq)][prevSq];
+  killers[0] = ss->killers[0];
+  killers[1] = ss->killers[1];
 
   stage = pos.checkers() ? EVASION : MAIN_SEARCH;
   ttMove = ttm && pos.pseudo_legal(ttm) ? ttm : MOVE_NONE;
@@ -210,7 +212,7 @@ Move MovePicker::next_move(bool skipQuiets) {
       }
 
       ++stage;
-      move = ss->killers[0];  // First killer move
+      move = killers[0];  // First killer move
       if (    move != MOVE_NONE
           &&  move != ttMove
           &&  pos.pseudo_legal(move)
@@ -219,7 +221,7 @@ Move MovePicker::next_move(bool skipQuiets) {
 
   case KILLERS:
       ++stage;
-      move = ss->killers[1]; // Second killer move
+      move = killers[1]; // Second killer move
       if (    move != MOVE_NONE
           &&  move != ttMove
           &&  pos.pseudo_legal(move)
@@ -231,8 +233,8 @@ Move MovePicker::next_move(bool skipQuiets) {
       move = countermove;
       if (    move != MOVE_NONE
           &&  move != ttMove
-          &&  move != ss->killers[0]
-          &&  move != ss->killers[1]
+          &&  move != killers[0]
+          &&  move != killers[1]
           &&  pos.pseudo_legal(move)
           && !pos.capture(move))
           return move;
@@ -251,8 +253,8 @@ Move MovePicker::next_move(bool skipQuiets) {
           move = *cur++;
 
           if (   move != ttMove
-              && move != ss->killers[0]
-              && move != ss->killers[1]
+              && move != killers[0]
+              && move != killers[1]
               && move != countermove)
               return move;
       }