Atrio
Atrio is a 2000 game from Christian Gibon, published at LM Créations and Murmel Spielwerkstatt und Verlag AG.
The game is played on the following board (I was unable to find the initial setup),
Each player starts with three marbles, two regular and one special.
- The regular marbles can move one space in each direction (orthogonal or diagonal)
- The special marbles can move one or two spaces in the same directions
The goal is to place your marbles inside the center 9x9 area (inside the interior circle), or else to push out one enemy marble out of the board (outside the exterior circle).
If the moving marble is adjacent, in the moving direction, to an enemy marble, it will push the enemy marble. This is valid only if all spaces where the pieces move thru are previously unoccupied. The Ko rule applies, the next player cannot use the same pushed marble on the opposite direction of the previous move.