Squares
Objective
Form squares on the board by marking four corners with your piece (i.e. an X in each corner.) Only squares with sides parallel to the playing field count.
Scoring
When a square is formed, you get as many points as a single side of the square (i.e. a 3 by 3 square = 3 points). So, the bigger the square the more points you get! Also, if you form two squares in a single move, you get points for both squares formed!
Winning
The game ends when, time expires, the board is full, or there are no more scoring moves left to make. (So, if game ends with some empty spaces, it is because there were no more scoring moves left).
The Player(s) with the highest score wins.