Atoll

Atoll is a two player connection game played on a hexagonally tessellated board. The board is surrounded by eight "islands" of stones, alternating between black islands and white islands going around the board.

Players take turns adding their stones to the board, one stone per turn. Black makes the first placement of the game. Each player will always have a placement available on his turn and must make one.

To win you must connect two islands of your color on opposite sides of the board with a contiguous chain of your stones. The islands themselves can be part of the chain. So for example, Black could form one bridge between his North and West islands and a second bridge between his West and South islands to win. Likewise for White and the white islands.

Like Hex, a completely filled-in board must result in a winning connection for exactly one of the two players.

				Generalized AtollAtoll could be characterised as a generalisation of Hex where the number of islands is eight rather than four. A generalized Atoll can be played with any multiple of four islands.

The generalized object of the game is as follows: A perimeter path is a sequence of edge cells (the outermost cells in the playable area). To win you must connect two or more of your islands such that the shortest possible perimeter path that connects to those islands connects to at least one more than half the total number of islands. For example, on a 12 island board you must connect two or more of your islands such that the shortest possible perimeter path that connects to those islands connects to at least seven (12/2 + 1) islands.

Online Play

 Yucata (turn-based)