Remove castling extension

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index c7d2efd40da46bb6189e834fea0bee051ae2f182..17cd0a73b61d596897b5e13e704490f85bef8d48 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1127,11 +1127,6 @@ moves_loop: // When in check, search starts from here
                && 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)) <= 2)
-          extension = 1;
-
       // Late irreversible move extension
       if (   move == ttMove
           && pos.rule50_count() > 80