Play hearthstone against other members of the DJB. Each win is worth one point, a loss is worth no points. Whoever has the most points by competition-end wins. In the event of a tie, the winner will be decided by least amount of losses.

Just send a screenshot of the victory/defeat screen at the end of each game, as well as the DJB names of both participants, to [Log in to view e-mail addresses] and [Log in to view e-mail addresses] and your entry will be counted.

The game can be found here: https://us.battle.net/account/download/?show=hearthstone&style=hearthstone

All you need is a battle.net username, and you're good to go!