For those of you who have mastered Mah Jongg, here's a new Solitaire challenge -- Shisen! The object, as in most solitaires, is to remove the similar pieces. The layout is a single layer, spread 18 tiles wide by 8 tiles deep. The catch? You can only remove tiles that no other tiles are between, or that can be connected with a line of no more than two bends. If you're unsure of this, feel free to use the Beginner's mode -- Once you see it in action, you're sure to catch on quickly! 
Several different tile types & markings, and different backgrounds are also available for added variety.