DEFINITIONS

Two like-colored stones are connected if they are orthogonally or diagonally adjacent to each other. A chain is a set of like-colored, connected stones.

PLAY

Starting with Black, the players take turns placing stones of their own color on empty points of the board, one stone per turn.

The pie rule is used in order to make the game fair. This means that White has the option, after Black's first move only, to remove Black's stone from the board and place a White stone on a point diagonally symmetrical to it.

It's illegal to form a cross, i.e. a 2x2 pattern of stones consisting of two Black and two White stones diagonally adjacent to each other.

If a player can't make a move on his turn, he must pass. Passing is otherwise not allowed. There will always be a move available to at least one of the players.

The game is won by the player who completes a chain of his color touching the two opposite board edges of his color. Draws are not possible.

Note: Refer to "Crossway.pdf" for further details.