dev: Added QS/KS castle checking; simplified moveList pruning

Piece.hpp

@@ -11,6 +11,7 @@
 #pragma once
 
 #include <cstdint>
+#include <algorithm>
 #include <utility>
 #include <string>
 #include <memory>
@@ -34,6 +35,10 @@ enum File {
     A = 0, B = 1, C = 2, D = 3, E = 4, F = 5, G = 6, H = 7, INVALID_FILE = 255
 };
 
+enum CastleSide {
+    KINGSIDE = 1, QUEENSIDE = 2
+};
+
 struct Square {
     Rank rank;
     File file;
@@ -101,11 +106,18 @@ class King : public Piece {
         return inCheck;
     }
 
-    bool checkForCastle() const {
-        return canCastle;
+    bool checkForCastle(enum CastleSide side) const {
+        if(side == KINGSIDE) {
+            return canCastleKS;
+        } else if(side == QUEENSIDE) {
+            return canCastleQS;
+        } else {
+            return false;
+        }
     }
   protected:
-    bool canCastle = true;
+    bool canCastleQS = true;
+    bool canCastleKS = true;
     bool inCheck = false;
 };