Seven cards. One hidden rule.
300 Catalogues puzzles
Browse 300 fixed Catalogues puzzles. Each numbered list has seven cards, one hidden ordering rule, and five guesses.
A library you can revisit
These numbered puzzles stay fixed, so you can return to a favorite or send a friend the same challenge. The library rotates through easy, medium, and hard: puzzle 1 is easy, puzzle 2 medium, puzzle 3 hard, and so on. Hard puzzles show a plain label where the hint title would be. New here? Read how to play first.
Every puzzle is generated from our own fact lists with fixed seeds. Each list names its source, and the generator refuses any seven cards where two values tie or sit too close to call. The puzzles are not copied from another game's puzzle bank. For a shared start, open the daily puzzle, or deal a fresh list in unlimited.