Setup
Place the hemisphere in the center of the table as the game's base.
The hemisphere is placed in the middle of the table at the start of the game. It serves as the central base that supports the ring structure.
Setup
Adjust the three rings onto their rests as horizontally as possible.
There are three rings of different sizes — small, medium, and large — each with drill holes for placing balls. Before play begins, all three rings must be adjusted to their respective rests and made as horizontal as possible.
Setup
Each player takes one set of colored balls containing three balls of different sizes.
Each player receives one set of colored balls. Each set contains three balls in three different sizes, which also correspond to three different weights: small (weight/point value 1), medium (weight/point value 2), and large (weight/point value 3).
Turn structure
On your turn, place one of your remaining balls into a drill hole on any ring.
On your turn you choose one of your remaining balls and carefully place it into a drill hole on one of the three rings (small, medium, or large). A brief, momentary contact of a ring with the table is allowed while you are placing the ball. After placing, if no ring permanently touches the table, the placement is valid and play passes to the next player.
Restriction
A placement is valid only if no ring permanently touches the table after the ball is placed.
A placement is considered valid if, once the player has placed their ball, no ring remains in permanent contact with the table. A momentary, brief touch during the act of placing is allowed. If the placement is valid, the ball stays in its hole and it is the next player's turn.
Restriction
If a ring permanently touches the table after placement, the ball must be taken back.
If one or more rings touch the table permanently as a result of a player's placement, that placement is not valid. The player must remove their ball from the ring. The retrieved ball is returned to the player's supply and may be used again on a future turn.
Scoring
A ball's score equals its weight multiplied by the point value of the ring it is placed on.
Each ball placement earns points equal to the ball's weight multiplied by the point value of the ring it occupies. Ring point values: small ring = 1 point, medium ring = 2 points, large ring = 3 points. Ball weight values: small ball = 1 point, medium ball = 2 points, large ball = 3 points. Examples: weight-3 ball on small ring = 3×1 = 3 points; weight-1 ball on medium ring = 1×2 = 2 points; weight-2 ball on large ring = 2×3 = 6 points.
Scoring
A player's total score is the sum of all their valid placements' scores.
At the end of the game, each player's score is calculated by summing the individual scores (ball weight × ring value) of every ball they successfully placed on the rings. Balls that were never successfully placed do not count toward any player's score.