You play me until you win. If that sounds too hard, you'll have to play each other best out of three. Well, that's actually the default option encase of a tie.
I have something hidden in an imaginary valley. I have also removed something from the valley. What is and isn't in the valley? Yes, there is a trick to this. Look closely and you can possibly figure it out. Each player gets infinite tries. Whoever doesn't figure it out before Friday doesn't get a letter. Last person to figure it out doesn't get a letter.