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Sudoku

👪 ages 6-12🏷️ Brain and Logic Games🎯 Planning and thinking ahead🆓 Free
Score: 0

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📘 How to Play Sudoku

Each row, column and box uses every number once. Three sizes from easy 4×4 to hard 9×9.

🧠 What it builds

Short, regular sessions (10-15 minutes a day) work better than one long sitting.

📱 Where it runs

Works in the browser on phone, tablet and desktop — no install, no sign-up. Turn the phone sideways and the layout rearranges itself, keeping every control finger-sized.

🎯 Who it is for

Designed for ages 7-12.

❓ Frequently Asked Questions

Does the game warn about wrong numbers?

Yes, a number that breaks a rule turns red. It is a learning aid for children; there is no "no-hint" mode.

Is 4×4 sudoku real sudoku?

Yes: it uses 2×2 boxes with the same rules — the best start for ages 6-7. The 6×6 boxes are 2×3.

How do I erase a number?

Tap the square and press the ✖ (erase) button at the bottom, or pick another number.

Do the puzzles have a unique solution?

Yes. Every puzzle is verified to have exactly one solution when generated, so it is solved by logic, not guessing.

Does 9×9 fit on a phone?

On an upright phone the squares shrink to 33-36 pixels, so a tablet or computer is more comfortable for 9×9; 6×6 is recommended on phones.

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