From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Sat, 18 Jul 2020 08:33:59 +0000 (+0200)
Subject: Merge official-stockfish/master
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=3318cc0ec00907aaf8e811a498a10a182651b9f1;p=fairystockfish.git

Merge official-stockfish/master
---

3318cc0ec00907aaf8e811a498a10a182651b9f1
diff --cc src/bitboard.h
index f841214,b0e2723..e73d36f
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@@ -272,20 -199,10 +272,20 @@@ inline Bitboard adjacent_files_bb(Squar
  /// If the given squares are not on a same file/rank/diagonal, return 0.
  
  inline Bitboard between_bb(Square s1, Square s2) {
-   return LineBB[s1][s2] & ( (AllSquares << (s1 +  (s1 < s2)))
-                            ^(AllSquares << (s2 + !(s1 < s2))));
+   Bitboard b = LineBB[s1][s2] & ((AllSquares << s1) ^ (AllSquares << s2));
+   return b & (b - 1); //exclude lsb
  }
  
 +inline Bitboard between_bb(Square s1, Square s2, PieceType pt) {
 +  if (pt == HORSE)
 +      return PseudoAttacks[WHITE][WAZIR][s2] & PseudoAttacks[WHITE][FERS][s1];
 +  else if (pt == JANGGI_ELEPHANT)
 +      return  (PseudoAttacks[WHITE][WAZIR][s2] & PseudoAttacks[WHITE][ALFIL][s1])
 +            | (PseudoAttacks[WHITE][KNIGHT][s2] & PseudoAttacks[WHITE][FERS][s1]);
 +  else
 +      return between_bb(s1, s2);
 +}
 +
  
  /// forward_ranks_bb() returns a bitboard representing the squares on the ranks
  /// in front of the given one, from the point of view of the given color. For instance,