X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fsearch.cpp;h=c5b4332f7213aff47f8b618e89a3d8085dade0fb;hb=992f549ae7f4f73b025429c44bdbbc65de917f6c;hp=ef47fd22307ee9cdb31bbbbb5956d0f2869470a3;hpb=a72cec1ff854a77a92452c2afe2001e05f06e6d4;p=stockfish

diff --git a/src/search.cpp b/src/search.cpp
index ef47fd22..c5b4332f 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1139,7 +1139,7 @@ moves_loop: // When in check, search starts from here
 
       // 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