@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		MoveNode other = (MoveNode) obj;
		if (currentGrid == null) {
			if (other.currentGrid != null)
				return false;
		} else if (!currentGrid.equals(other.currentGrid))
			return false;
		if (move == null) {
			if (other.move != null)
				return false;
		} else if (!move.equals(other.move))
			return false;

		return true;
	}