The goal is to remove pegs from the board by jumping over each peg with another peg; this removes the "jumped" peg (similar to Checkers jumps). Click at the peg and an empty cell. Only horizontal and vertical jumps are allowed. The game is over when no more jumps are possible. You win the game by removing all the pegs except one from the board, the last peg must be in the gray cell.

peg solitaire move example
Orphus system