ToolAdda

Games

Sudoku

Play a premium, browser-only Sudoku experience with adaptive difficulty, notes, hints, undo/redo, solver support, and local progress saving.

Mode: Random Difficulty: Medium Progress: Loading puzzle…
What is Sudoku?

Sudoku is a logic puzzle where each row, column, and 3×3 box must contain the digits 1 through 9 without repetition.

How do notes work?

Activate notes mode to place small candidate numbers in a cell while keeping the board editable for future moves.

Can I continue later?

Yes. The current board, timer, notes, moves, and stats are stored locally in your browser so you can resume after refresh.

Privacy notice

All game data is stored locally inside your browser. Nothing is uploaded to any server, and your Sudoku progress remains on your device only.