/*Euclídea*/return Math.sqrt(Math.pow((board.getCurrentX()-board.getGoalX()),2) + Math.pow((board.getCurrentY()-board.getGoalY()),2));

/*DIagonal	*/ return Math.max(Math.abs((board.getCurrentX()-board.getGoalX())) , Math.abs((board.getCurrentY()-board.getGoalY())))

/*Manhattan*/ return Math.abs(board.getCurrentX()-board.getGoalX()) + Math.abs(board.getCurrentY()-board.getGoalY());