Sudoku — Play Free | Shiina Play

How to play

Controls: Click or tap a cell to select it, then press 1–9 (or the on-screen pad on touch) to enter a digit. Use the arrow keys to move the selection, Backspace or Delete to clear, N to toggle pencil notes, H for a hint, and C to check your grid.

Pick a difficulty — Easy, Medium, Hard or Expert — and a uniquely-solvable 9×9 puzzle appears.
Fill the grid so every row, every column, and every 3×3 box contains the digits 1–9 exactly once.
Click or tap a cell and enter the digit you deduce; a digit that clashes with a row, column or box is rejected instantly.
Use pencil notes to mark candidate digits, or press H to reveal one correct cell (you get a small hint budget).
Complete the whole grid correctly to win — your fastest solve time is saved for each difficulty.

Features

The classic 9×9 Sudoku — no mashups, no gimmicks.
Four difficulties, from 30-clue Easy puzzles to brutal 17-clue Expert grids.
Every puzzle is generated with a verified unique solution.
Row, column and box highlighting plus matching-digit highlights make scanning easy.
Pencil notes, hints, and a check tool for when you get stuck.
Free to play. Best times saved per difficulty.

FAQ

How do I play Sudoku?

Fill the 9×9 grid so that every row, every column, and every 3×3 box contains the digits 1–9 exactly once. Start from the given clues and deduce the rest — enter a digit into an empty cell, and the game rejects any entry that clashes with its row, column or box.

Is Sudoku free to play?

Yes, completely free.

Does it save my best time?

Yes. Your fastest solve time is saved automatically for each difficulty and stored locally in your browser on your own device.

What are the four difficulties?

Easy puzzles give you about 30 clues, Medium about 25, Hard about 20, and Expert about 17 — the fewest clues a unique Sudoku can have. Fewer clues means more deduction and a longer solve.

What if I get stuck?

Toggle pencil notes to track candidates, or press the hint button to reveal one correct cell (you have a small hint budget per puzzle). The check button flags any digits that don't match the solution.

Features

FAQ

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