X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fbitboard.h;h=15ec4153362d82d1339e9657e19190cf2e118005;hb=1f3bd968bb194a1f42af661cca9ec445c13978e8;hp=afeb40ec146f2af01d2626111fe19450148c90f3;hpb=4006f2c9132db034a27a94be33070d6aaab75b24;p=stockfish

diff --git a/src/bitboard.h b/src/bitboard.h
index afeb40ec..15ec4153 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -130,6 +130,13 @@ constexpr bool more_than_one(Bitboard b) {
   return b & (b - 1);
 }
 
+/// Counts the occupation of the bitboard depending on the occupation of SQ_A1
+/// as in `b & (1ULL << SQ_A1) ? more_than_two(b) : more_than_one(b)`
+
+constexpr bool conditional_more_than_two(Bitboard b) {
+  return b & (b - 1) & (b - 2);
+}
+
 constexpr bool opposite_colors(Square s1, Square s2) {
   return (s1 + rank_of(s1) + s2 + rank_of(s2)) & 1;
 }