Definitions

In these rules, "adjacent" always means "orthogonally adjacent".

Two adjacent opposite-colored pieces are engaged to each other if their rods form a single continuous line.

A group is a piece along with all other pieces one could reach from it through a series of steps between adjacent like-colored pieces. Thus, all pieces in a group are the same color.

The size of a group is the number of pieces in it.

Play

On your turn, if possible, perform exactly one of these actions:

- Place two pieces of different colors on adjacent empty squares so that they are engaged to each other.

- Swap the positions of two adjacent pieces of different colors that are already engaged but not to each other, and rotate them so that they are engaged to each other.

If you have no moves available, you must pass. Passing is otherwise not allowed.

The game ends when both players pass in succession. The player with the higher score in the final position wins. Your score is the biggest group size in which you have the greater number of groups. If there is no such size, your score is zero. If both players are tied at zero points, whoever made the last move loses.

Pie rule

The pie rule is used in order to make the game fair. This means White will have the option, on their first turn only, to swap sides with their opponent instead of making a regular move.

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