The goal is to sum check boxes value by ticking them to arrive at the random number. You can't tick a check box more than once.
For example if random number is 6, you can add 1 + 2 + 3, or 2 + 4.*
The end of the game happens when sum of remaining check boxes can't get random number.
I knew this board game during my semester in Canada. I enjoyed playing it, well I tried to reproduce.