Trivit, a daily card puzzle.

• The daily. One board a day, the same for everyone, from three trios on Monday to seven on Sunday.
• Practice. Four short Basics lessons, one per trait, then five exercises up to a full board.
• The Leaderboard. Friends and groups, each group with its own scoring.
• 1v1. Challenge a friend to a board of your own, played at different times.
• Holidays. On Halloween every card wore a costume.

How to play, in sixty seconds.

On 31 October every card in Trivit wore a costume: round shapes became pumpkins, angular ones bats and notched ones ghosts, with fill, colour and count unchanged, so the puzzle was the same puzzle. Everyone who played that day earned the costume for their card on the Leaderboard, to keep.