Remove skipQuiets with mate fix. (#2021)

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 2e7dd6989736fa786c2a0b5ada5d681d35cb7136..d3f1335bdb06292e2fff341a98ba1ee9c8edafad 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -913,10 +913,6 @@ moves_loop: // When in check, search starts from here
       movedPiece = pos.moved_piece(move);
       givesCheck = gives_check(pos, move);
 
-      // Skip quiet moves if movecount exceeds our FutilityMoveCount threshold
-      moveCountPruning = depth < 16 * ONE_PLY
-                      && moveCount >= FutilityMoveCounts[improving][depth / ONE_PLY];
-
       // Step 13. Extensions (~70 Elo)
 
       // Singular extension search (~60 Elo). If all moves but one fail low on a
@@ -967,6 +963,10 @@ moves_loop: // When in check, search starts from here
           && pos.non_pawn_material(us)
           && bestValue > VALUE_MATED_IN_MAX_PLY)
       {
+          // Skip quiet moves if movecount exceeds our FutilityMoveCount threshold
+          moveCountPruning = depth < 16 * ONE_PLY
+                          && moveCount >= FutilityMoveCounts[improving][depth / ONE_PLY];
+
           if (   !captureOrPromotion
               && !givesCheck
               && !pos.advanced_pawn_push(move))