It consists of a 6 by 6 grid of poles and a bag of 150 disks that stack onto the poles. Each person places 3 disks onto any poles. When there are 4 on a pole, all 4 disks are distributed among neighboring poles. If this causes a cascade (i.e. another 4 has been created), continue this process, gaining 1 disk as a point for each time this happens. The game ends when the bag is out of disks. The winner is the player with the most disks (points).

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