Ludii Portal

Manifold is a polyhex building game for two players – Black and White – played on an initially empty hexhex board. Michael Amundsen invented Manifold in May 2022.

Rules

Definitions:
1 A group is a stone along with all stones one can reach from it through a series of steps onto adjacent stones of the same color.
1.1 The size of a group is the number of stones in it.

2 A brood is a group along with all other groups of identical color, size and shape. Shapes are considered identical across rotational and mirror-symmetries.
2.1 The size of a brood is the number of groups in it.
2.2 The order of a brood is the size of the groups in it.

Play:
On the very first turn of the game, Black places one stone of their color on any hex.
After, that – starting with White – take turns doing one of the following:
• Pass.
• Place two stones of your color on empty hexes.

When the players pass consecutively, the winner is the player with the higher score.

Scoring:
For each of your odd-sized broods, you score 1 point if its order is odd and 2 points if its order is even.