The most challenging games are those that make you think. The hardest opponent you can face is yourself. And this game can give you both of that if you're up to give it a try.

Peg solitaire, also known as Solo Noble or Brainvita, is a one player board game. At the start, you will be facing a board with multiple pegs. You will have to move the pegs vertically or horizontally, jumping above another peg and to a hole. At the end, there must be a single peg remaining on the board for you to pass the level.

This app has 26 challenging boards with different patterns and numbers of pegs for you to try. It has simple gameplay and works on Android phones and tablets. So, if you're ready to embark on a mind game with yourself, then go download the app today.