UniChess

The goal of the puzzle is to leave just one piece with only capture moves.
It can be played completely by yourself for ---
 - Simply killing time
 - Brain training
 - Learning and getting farmiliar with chess piece moves

And the app generates puzzles using pieces from a single chess set(with no extra queens), so you can have fun with your favorite chess set!

(This app is also available on Amazon App Store for Fire tablets too)