Game
Sudoku
Classic puzzles with a single solution — five difficulty levels, hints, pencil marks and auto-save.
Choose a difficulty, use pencil marks and hints, and resume an auto-saved puzzle.
About the game
A desktop-style Sudoku game for the web. Rust/PyQt5 sibling builds exist too.
Features unique puzzles with a single solution, five difficulty levels, pencil marks, hints, undo/redo, statistics, auto-save and light/dark themes.
How to play
Fill the 9×9 grid so every row, column and 3×3 box contains the digits 1–9 exactly once.
Touch / mouse
Tap a cell, then tap a number. Toggle Notes to pencil in candidates.
Keyboard
- Arrows — move the cursor
- 1–9 — place a digit (or pencil mark in Notes mode)
- 0 / Backspace / Delete — erase a cell
- N — toggle Notes mode
- H — hint · P or Space — pause · Esc — deselect
- Ctrl+Z / Ctrl+Y — undo / redo