Remove last captures extension

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index ef47fd22307ee9cdb31bbbbb5956d0f2869470a3..1d5bc5f7c844edae9337c367510e01ae60401ae2 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -794,11 +794,7 @@ namespace {
     else
     {
         if ((ss-1)->currentMove != MOVE_NULL)
-        {
-            int bonus = -(ss-1)->statScore / 512;
-
-            ss->staticEval = eval = evaluate(pos) + bonus;
-        }
+            ss->staticEval = eval = evaluate(pos);
         else
             ss->staticEval = eval = -(ss-1)->staticEval + 2 * Tempo;
 
@@ -1126,20 +1122,9 @@ moves_loop: // When in check, search starts from here
                && (pos.is_discovery_check_on_king(~us, move) || pos.see_ge(move)))
           extension = 1;
 
-      // Passed pawn extension
-      else if (   move == ss->killers[0]
-               && pos.advanced_pawn_push(move)
-               && pos.pawn_passed(us, to_sq(move)))
-          extension = 1;
-
-      // Last captures extension
-      else if (   PieceValue[EG][pos.captured_piece()] > PawnValueEg
-               && pos.non_pawn_material() <= 2 * RookValueMg)
-          extension = 1;
-
       // Castling extension
       if (   type_of(move) == CASTLING
-          && popcount(pos.pieces(us) & ~pos.pieces(PAWN) & (to_sq(move) & KingSide ? KingSide : QueenSide)) <= 3)
+          && popcount(pos.pieces(us) & ~pos.pieces(PAWN) & (to_sq(move) & KingSide ? KingSide : QueenSide)) <= 2)
           extension = 1;
 
       // Late irreversible move extension