Within the 6-by-6 grid, a number may occur no more than once in a horizontal line, vertical line, or 2-by-3 box.

First player to complete a horizontal line, vertical line, or 2-or-3 box, wins.

Player Green may use green dice and green squares.
Player Red may use red dice and red squares.
Either player may use white dice or white squares.

White dice are pre-rolled, and cannot be rolled again.
Green and red dice need to be rolled before using.

Players, starting with Green, take turns placing a die to the grid area.
A player may pass to end the turn, without placing a die.

When using a white die, the opponent will get an extra turn.