Bench: 23633596

src/search.c

@@ -475,8 +475,6 @@ static int AlphaBeta(Thread *thread, Stack *ss, int alpha, int beta, Depth depth
                 continue;
         }
 
-        MakeMove(pos, move);
-
         moveCount++;
 
         // Extension
@@ -494,9 +492,6 @@ static int AlphaBeta(Thread *thread, Stack *ss, int alpha, int beta, Depth depth
             && ttBound != BOUND_UPPER
             && !isTerminal(ttScore)) {
 
-            // ttMove has been made to check legality
-            TakeMove(pos);
-
             // Search to reduced depth with a zero window a bit lower than ttScore
             int singularBeta = ttScore - depth * (2 - pvNode);
             ss->excluded = move;
@@ -514,9 +509,6 @@ static int AlphaBeta(Thread *thread, Stack *ss, int alpha, int beta, Depth depth
             // Negative extension - not singular but likely still good enough to beat beta
             else if (ttScore >= beta)
                 extension = -1;
-
-            // Replay ttMove
-            MakeMove(pos, move);
         }
 
         // Extend when in check
@@ -525,6 +517,8 @@ static int AlphaBeta(Thread *thread, Stack *ss, int alpha, int beta, Depth depth
 
 skip_extensions:
 
+        MakeMove(pos, move);
+
         ss->move = move;
         ss->doubleExtensions = (ss-1)->doubleExtensions + (extension == 2);
         ss->continuation = &thread->continuation[inCheck][moveIsCapture(move)][piece(move)][toSq(move)];