Solitary Onyx, a piece of great elegance to decorate all kinds of tables and shelves, (includes Onyx balls).
The Solitaire game dates from the 18th century, its origin is unknown, although some authors are attributed to a French count that confined in the Bastille entertained with his forced solitude.
Starting to play the central square is empty, each move consists of jumping with one any piece on another adjacent, which is removed from the Board, as in the game of checkers, jumps can be done in any direction except diagonally.
The goal is to eliminate all the pieces except one, which must stop occupying the central point.
The number of moves at least up to now known, to solve it is eighteen, taking into account made of string with the same jumps tab they count as a single play. You can see the solution of 27 movements here.