All you have to do is try to leave one peg in the board. Are you up to the challenge?
The famous board game Peg Solitaire in your smartphone. It is a board game for one player involving movement of pegs on a board with holes. All you have to do is try to leave just one peg in the board.
According to a popular story, the game was invented by a French aristocrat in the 17th century, when incarcerated in the Bastille, explaining the game's less common name Solo Noble.