Puzzles & education / PuzzleClub
Original daily 4 by 4 number puzzle
Play an original daily 4 × 4 puzzle with one verified solution and share your result.
Free working edition. Named workspaces and exports are local to your device. Team sync, automatic source monitoring and paid memberships are not available.
All prefilled business examples are fictional. Replace them with your own checked inputs.
Ready. Choose your inputs and generate a result.
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Your result
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How this tool works
Digits 1–4 occur once per row, column and 2×2 box. Seeded generation removes clues only while the solver finds exactly one solution.
Method version: 2026-09-19.2
Reproducible example
All prefilled business examples are fictional. Replace them with your own checked inputs.
Digits 1–4 occur once per row, column and 2×2 box. Seeded generation removes clues only while the solver finds exactly one solution.
Sources and specifications
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