king, copy board logic, getPseudoMoves

Pawn.java

@@ -11,7 +11,12 @@ public class Pawn extends Piece {
     colorDir = color.equals("White") ? -1 : 1;
   }
 
-  public ArrayList<Position> getLegalMoves(Board board) {
+  public Piece copy() {
+    Piece newP = new Pawn(this.pos.x, this.pos.y, this.color);
+    return newP;
+  }
+
+  public ArrayList<Position> getPseudoLegalMoves(Board board) {
     ArrayList<Position> positions = new ArrayList<Position>();
 
     // diagonal moves (captures)
@@ -38,4 +43,8 @@ public class Pawn extends Piece {
     }
     return positions;
   }
+
+  public ArrayList<Position> getLegalMoves(Board board) {
+    return null;
+  }
 }