Peg solitaire (or Solo Noble) is a board game for one player involving movement of pegs on a board with holes. Some sets use marbles in a board with indentations. The game is known simply as Solitaire in the United Kingdom where the card games are called Patience. It is also referred to as Brainvita (especially in India).

Play
A man playing triangular peg solitaire at a Cracker Barrel restaurant.
A valid move is to jump a peg orthogonally over an adjacent peg into a hole two positions away and then to remove the jumped peg.