Summit Triad

Summit Triad uses the rule made famous by the card game Set. Each tile has three traits, its colour (teal, amber or red), its shape (triangle, diamond or circle) and its count of one to three shapes, and three tiles make a valid group when, for every trait, they are all alike or all different.

The board is a pyramid of fifteen numbered spaces, three of them given, which together form ten smaller triangles of three tiles each, such as 1-2-3, 2-4-5 and 3-5-6. Only the outlined triangles that point upward have to be valid. You drag tiles from the bank into the pyramid, or tap a tile and then its destination, and use each tile once. Because tiles sit in more than one triangle, tile 5 for instance must work in 2-4-5, 3-5-6 and 5-8-9 at once, every placement narrows the options around it.

The built-in guide suggests starting from two known tiles and working out the missing one a trait at a time, and ruling out candidates that would need a tile no longer in the bank. If you are stuck you can reveal a tile at the cost of an extra minute. There is one pyramid a day, the same for everyone, numbered from #1 on 10 August 2026 and new at midnight US Eastern time. A timer runs while you play, the finished time can be shared as a result card, and the archive lists every past pyramid with your times, average and longest streak. There are no ads and nothing to sign up for.

It suits fans of Set and of calm visual deduction, and players of the word puzzle Summit from the same maker.