1. Roll 3 dice and mark the sum of the 3 dice as the starter square.
2. Each player rolls the 3 dice and uses operations (addition, subtraction, multiplication, division) and all three dice numbers to form a new number on the Contig board. Put an X on this number.
3. Score 1 point for each marked square your new number touches.
4. Play 8 rounds.
5. Player with the highest score wins the game.

from:

http://www.mathwire.com/games/contig.pdf