Play

Ten rounds a day, and as much as you like between.

One shared daily puzzle. Practice by the thing you want to learn. Duels when you want to be quicker than someone. All of it fills one passport.

Not both online for a duel? Send a challenge: you play now, they have a day. Practice has a review of what you missed, back in 1, 3, 7, 14 and 30 days.