Broader condition for dangerous pawn moves

[stockfish] / src / bitboard.h

diff --git a/src/bitboard.h b/src/bitboard.h
index ecff5c3abd84a7ff5b6365ebf5329b4fcb09cef7..ceac2c24ed5b05f86866e14511347aa8a0ed7caf 100644 (file)
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -84,6 +84,8 @@ extern Bitboard PseudoAttacks[PIECE_TYPE_NB][SQUARE_NB];
 extern int SquareDistance[SQUARE_NB][SQUARE_NB];
 
 const Bitboard DarkSquares = 0xAA55AA55AA55AA55ULL;
+const Bitboard TheirHalf[COLOR_NB] = { Rank5BB | Rank6BB | Rank7BB | Rank8BB,
+                                       Rank1BB | Rank2BB | Rank3BB | Rank4BB };
 
 /// Overloads of bitwise operators between a Bitboard and a Square for testing
 /// whether a given bit is set in a bitboard, and for setting and clearing bits.
@@ -265,8 +267,8 @@ inline Bitboard attacks_bb(Piece p, Square s, Bitboard occ) {
   }
 }
 
-/// lsb()/msb() finds the least/most significant bit in a nonzero bitboard.
-/// pop_lsb() finds and clears the least significant bit in a nonzero bitboard.
+/// lsb()/msb() finds the least/most significant bit in a non-zero bitboard.
+/// pop_lsb() finds and clears the least significant bit in a non-zero bitboard.
 
 #ifdef USE_BSFQ