X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Ftypes.h;h=863e0df2f771be35033dd9e22debaa7d524f4203;hb=25b4d0c127af9fe564f7a797460bed4c2837bcc2;hp=873c18854c81a4db162aa7b3e35e9ca5fc6a2c19;hpb=ae2f5f25cd8a6bc2762eefc032436052c0db679e;p=stockfish

diff --git a/src/types.h b/src/types.h
index 873c1885..863e0df2 100644
--- a/src/types.h
+++ b/src/types.h
@@ -252,6 +252,15 @@ enum ScaleFactor {
   SCALE_FACTOR_NONE   = 255
 };
 
+enum CastleRight {
+  CASTLES_NONE = 0,
+  WHITE_OO     = 1,
+  BLACK_OO     = 2,
+  WHITE_OOO    = 4,
+  BLACK_OOO    = 8,
+  ALL_CASTLES  = 15
+};
+
 
 /// Score enum keeps a midgame and an endgame value in a single
 /// integer (enum), first LSB 16 bits are used to store endgame
@@ -339,6 +348,7 @@ const Value QueenValueEndgame  = Value(0x9FE);
 
 extern const Value PieceValueMidgame[17];
 extern const Value PieceValueEndgame[17];
+extern int SquareDistance[64][64];
 
 inline Value piece_value_midgame(Piece p) {
   return PieceValueMidgame[p];
@@ -431,7 +441,7 @@ inline int rank_distance(Square s1, Square s2) {
 }
 
 inline int square_distance(Square s1, Square s2) {
-  return Max(file_distance(s1, s2), rank_distance(s1, s2));
+  return SquareDistance[s1][s2];
 }
 
 inline char file_to_char(File f) {