private List<PegsPoint> getPlaces()
	{
		List<PegsPoint> placeList = new ArrayList<PegsPoint>();
		for (int y = 0; y < height; y++)
		{
			for (int x = 0; x < height; x++)
			{
				if (mask[y][x] == _)
				{
					placeList.add( new PegsPoint( x, y ) );
				}
			}
		}
		return placeList;
	}