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. Local saves and exports stay free. Optional membership adds cloud workspaces and version history; team accounts and automatic monitoring are not included.
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
Run the tool to see its output here. You can inspect, export or print the result.
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: 2026-09-19.3
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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