Designed by T. Denoul and made by Blue Orange Games 2000;
augmented with 5 sets of light and dark top 5-nesting clear cups, J. A. Storer 2005.
(wood box and cups where top turns over to be the board, 9.5 square)

Board: 4x4 rectangular array.

Pieces: Light and dark nesting cups ("goblets"), 3 each of 4 different diameters.

Terms: A stack is a set of nesting cups facing down. Stacks on the table are external stacks. Start: The board is empty, white and black each have 3 external stacks of 4 cups each.

Play: White goes first, players move alternately. An outermost cup of the player's color may be removed from an external stack or from a stack on the board (possibly revealing cups underneath) and placed on a square of the board that is either empty or contains smaller cups (of any combination of sizes and colors).

Play Exceptions:
3-in-a-row rule: The outermost cup of an external stack may be placed on a non-empty square ONLY when this square is on at least one row (horizontal, vertical, or diagonal) already containing 3 stacks with the opponent's color on top.
touch rule: Players my not touch any stacks with the opponent's color on top. Players may touch their external stacks at any time. Players may touch a stack on the board with their color on top ONLY when it is their turn, and once touched, that cup MUST be moved to a different square.

Win: A player wins if at the completion of a turn, there is a row of 4 stacks (horizontal, vertical, or diagonal) with his or her color on top, and the opponent does not have a row of 4. NOTE: The opponent may temporarily have 4 in a row during a turn (because you move a cup to a different position in the same row), but if at the end of your turn the opponent has 4 in a row, you lose whether or not you have made 4 in a row.

Draw: The game is a draw if a position is repeated three times, or by agreement.

Goblet Variations

Goblet Moku

Building Goblet Pieces From Plastic Pipe
The standard goblet game purchased at the store uses solid pieces so you can't see inside a stack. Clear pieces remove the "memory" component and allow the player to concentrate on the logical component (more fun for some, less for others).

Basic Idea: Cut up different diameters of plastic tubing and plug the tops with dark or light wood. Use clear plastic for clear pieces. Solid pieces can be made with non-clear tubing (hard or impossible to find in small quantity) or by spraying painting clear pieces.

Common types of rigid plastic tubing: Diameters below 1.5" are most common in 1/8" increments with 1/16" thick walls (e.g., 5/8" inside diameter with 3/4" outside diameter).
Cast Acrylic: High quality, easy to machine, but may be hard to find in diameters below an inch, and costs more.

Extruded Acrylic: Cheaper than cast, and very clear, but a bit brittle to work with.

Polycarbonate: Similar to the brand name "Lexan". Almost as clear as extruded acrylic, as cheap, a bit more flexible, and a bit less prone to chipping.

CAB: Very cheap, but not as clear (a bit of a yellow tint).

A Set of 5 Goblets:
1. 1" long, 1/2" diameter (solid wood).
2. 1+3/8" long, 5/8" I.D., 3/4" O.D., 5/16" thick wood plug in top.
3. 1+3/4" long, 7/8" I.D., 1" O.D., 5/16" thick wood plug in top.
4. 2+1/8" long, 1+1/8" I.D., 1+1/4" O.D., 5/16" thick wood plug in top.
5. 2+1/2" long, 1+3/8" I.D., 1+1/2" O.D., 5/16" thick wood plug in top.