Ten Tantrix tiles, numbered 1 to 10, have to be pieced together to form a continuous closed loop of color. Starting with the first 3 tiles, numbered in yellow, form a yellow loop. Add tile # 4, numbered in red and form a red loop using the 4 tiles. Add tile # 5, numbered in blue and form a blue loop using the 5 tiles. Keep adding tiles and forming loops - if you can! This puzzle keeps on going no matter how many additional packs of 10 tiles are added into play.