TriGo is a two-player board game invented by Steve Metzger. This is a Go variant played on a hexagonal board with a triangular grid.

The objective of Trigo is to have a higher score than your opponent after both players have passed a turn. Your score is the addition of the intersections that your stones are surrounding plus the number of your opponent's stones you have captured.


The board is a hexagon with triangular gridlines, 8 intersections per side (169 intersections).

Each player is given an unlimited number of either white or black stones. These stones are to be placed on the intersections. Black plays first, placing ONE stone anywhere on the board that they wish. White plays second, placing TWO stones. Every subsequent move, a player places TWO stones. If a player wishes to pass, they forfeit their placement of both stones. Stones are considered to be placed simultaneously during a turn, meaning that suicide rules apply to a move, not a single stone placement.

If a stone or group of stones is surrounded (i.e. left without liberties) by the opponent's stones after he puts down both stones, they are considered captured, removed from the board, and counted towards the surrounding player's score.

You may not, as a result of a move, return the board to a position that it was at one turn previously.

End of Game
If both players have passed, the game is over, and the score is counted. Scores consist of two elements: the number of empty intersections that your own stones surround (without interference from opposing pieces), and the number of opponent's stones you have captured. Both of these are added together to get your score.

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