X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftypes.h;h=bbfd0c71a73194c5f9c78249d13658ce3b9f3b79;hp=cf0b3f953dedcad5826f47c21a2deb2fd6000699;hb=61a054b17002a167a09ce09eb9a7d820d792c680;hpb=5e905800887da94d481978d3bddd9539b2111458

diff --git a/src/types.h b/src/types.h
index cf0b3f95..bbfd0c71 100644
--- a/src/types.h
+++ b/src/types.h
@@ -35,6 +35,7 @@
 ///               | only in 64-bit mode. For compiling requires hardware with
 ///               | popcnt support.
 
+#include <cctype>
 #include <climits>
 #include <cstdlib>
 
@@ -127,11 +128,11 @@ inline bool operator<(const MoveStack& f, const MoveStack& s) {
   return f.score < s.score;
 }
 
-enum CastleRight {
+enum CastleRight {  // Defined as in PolyGlot book hash key
   CASTLES_NONE = 0,
   WHITE_OO     = 1,
-  BLACK_OO     = 2,
-  WHITE_OOO    = 4,
+  WHITE_OOO    = 2,
+  BLACK_OO     = 4,
   BLACK_OOO    = 8,
   ALL_CASTLES  = 15
 };
@@ -347,7 +348,7 @@ inline Piece make_piece(Color c, PieceType pt) {
 }
 
 inline CastleRight make_castle_right(Color c, CastlingSide s) {
-  return CastleRight((s == KING_SIDE ? WHITE_OO : WHITE_OOO) << c);
+  return CastleRight(WHITE_OO << ((s == QUEEN_SIDE) + 2 * c));
 }
 
 inline PieceType type_of(Piece p)  {