You can play Chess Solitaire on your mobile device for free. You don't have to download anything other thing or pay for a single item.

How to play Chess Solitaire:

The game is pretty easy to play, but you need to be aware that the computer will always be smarter than you. That means you will always have to make moves that are unpredictable even for a computer. 

If you want to get a better idea of how to play Chess Solitaire, you can always take a look at the moves of the most renowned players in the world. That way, you can learn from their example and improve your game.