X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=496df5db93f18d553f2634bcdcfa07a927fabea4;hp=727990dc9d354b753004ae37b61afd7f2c1d28ad;hb=4095ff0ee51bdc76c247bd11d5f3a7008974e2ad;hpb=7e9f776fcafe0121c7449f4339b26d77c14adf50

diff --git a/src/search.cpp b/src/search.cpp
index 727990dc..496df5db 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -674,8 +674,7 @@ namespace {
     if (   !PvNode
         &&  depth < 4 * ONE_PLY
         &&  eval + razor_margin(depth) <= alpha
-        &&  ttMove == MOVE_NONE
-        && !pos.pawn_on_7th(pos.side_to_move()))
+        &&  ttMove == MOVE_NONE)
     {
         if (   depth <= ONE_PLY
             && eval + razor_margin(3 * ONE_PLY) <= alpha)
@@ -959,10 +958,9 @@ moves_loop: // When in check and at SpNode search starts from here
                                         [pos.piece_on(to_sq(move))][to_sq(move)] <= VALUE_ZERO))
               ss->reduction += ONE_PLY;
 
-          if (    move == countermove
-              || (   History[pos.piece_on(to_sq(move))][to_sq(move)] > VALUE_ZERO
-                  && CounterMovesHistory[pos.piece_on(prevMoveSq)][prevMoveSq]
-                                        [pos.piece_on(to_sq(move))][to_sq(move)] > VALUE_ZERO))
+          if (   History[pos.piece_on(to_sq(move))][to_sq(move)] > VALUE_ZERO
+              && CounterMovesHistory[pos.piece_on(prevMoveSq)][prevMoveSq]
+                                    [pos.piece_on(to_sq(move))][to_sq(move)] > VALUE_ZERO)
               ss->reduction = std::max(DEPTH_ZERO, ss->reduction - ONE_PLY);
 
           // Decrease reduction for moves that escape a capture
@@ -1428,7 +1426,7 @@ moves_loop: // When in check and at SpNode search starts from here
     }
 
     // Extra penalty for TT move in previous ply when it gets refuted
-    if (is_ok((ss-2)->currentMove) && (ss-1)->currentMove == (ss-1)->ttMove)
+    if (is_ok((ss-2)->currentMove) && (ss-1)->currentMove == (ss-1)->ttMove && !pos.captured_piece_type())
     {
         Square prevPrevSq = to_sq((ss-2)->currentMove);
         HistoryStats& ttMoveCmh = CounterMovesHistory[pos.piece_on(prevPrevSq)][prevPrevSq];