HASH

Every card has four features: number (1, 2 or 3 shapes), shape (diamond, squiggle, oval), shading (solid, striped, open) and color (red, green, purple). The 81 cards cover every combination exactly once.

Click three cards to claim a Hash. A valid Hash is one where, for each of the four features, the three cards are either all the same or all different: never two-and-one. Spot one, click its three cards, and they're replaced from the deck.

Stuck? Hint glows one (then two) cards of a real Hash, but it costs +30 seconds on the clock each time. If there's truly no Hash on the table, Add 3 cards deals more (it warns you if a Hash was actually hiding). Clear the whole deck to win. Your fastest time (penalties included) is saved as your best.

Normal is the game above. In Set-Chain the cards of your last Hash move aside, and every Hash after the first uses exactly one of them with two from the table; when none can, more cards come in. In UltraSet pick four cards that split into two pairs, where both pairs need the same third card to make a Hash (that card can be anywhere, even still in the deck); it shows beside the table.

Junior plays any of the three with only the 27 solid cards, so shading never counts. Daily deals today's cards, the same for everyone, in each of the six, and records your first clear of the day. Each of the six keeps its own best time, and the log lists everything you've found this game.