Added different heuristics

src/controller/GameConstants.java

@@ -10,4 +10,12 @@ public class GameConstants {
 	public static final int MAX_PASSIVE_MOVES = 50;
 	public static final int MAX_SEARCH_DEPTH = 7;
 	public static final int BOARD_SIZE = 8;
+
+	/* Parameters to the heuristic */
+	public static final boolean APEX = true;
+	public static final boolean BACK = true;
+	public static final boolean CENT = true;
+	public static final boolean MOB = true;
+	public static final boolean PIECE_DIFFERENTIAL = true;
+
 }

src/model/Board.java

@@ -2,6 +2,8 @@
 
 import java.util.ArrayList;
 
+import controller.GameConstants;
+
 /**
  * The representation is a 8x8 grid where
  * A[row][col] marks the position of the checker piece.
@@ -387,16 +389,56 @@ public boolean isPromotionLocation(Location location) {
 				location.row == BOARD_SIZE - 1 );
 	}
 
-	public int getHeuristic(Color color) {
-		/* Kings are weighted more, so we count for them twice */
-
+	public int pieceDifferentialHeuristic(Color color) {
 		int blackHeuristic = blackPieces + blackKings;
 		int whiteHeuristic = whitePieces + whiteKings;
-		return - (color == Color.BLACK ? 
+		return - (color == Color.BLACK ? 
 				(blackHeuristic - whiteHeuristic) : 
 					(whiteHeuristic - blackHeuristic));
 	}
 
+	public int apexHeuristic(Color color) {
+
+		return 0;
+	}
+
+	public int backHeuristic(Color color) {
+
+		return 0;
+	}
+
+	public int centHeuristic(Color color) {
+
+		return 0;
+	}
+
+	public int mobHeuristic(Color color) {
+
+		return 0;
+	}
+
+	public int getHeuristic(Color color) {
+		/* Kings are weighted more, so we count for them twice */
+		int heuristic = 0;
+		if (GameConstants.PIECE_DIFFERENTIAL) {
+			heuristic += pieceDifferentialHeuristic(color);
+		}
+		if (GameConstants.APEX) {
+			heuristic += apexHeuristic(color);
+		}
+		if (GameConstants.BACK) {
+			heuristic += backHeuristic(color);
+		}
+		if (GameConstants.CENT) {
+			heuristic += centHeuristic(color);
+		}
+		if (GameConstants.MOB) {
+			heuristic += mobHeuristic(color);
+		}
+
+		return heuristic;
+	}
+
 	public Piece getPiece(Location location) {
 		return representation[location.row][location.column];
 	}