Quick Sudoku

Quick Sudoku is a clean and lightweight browser-based Sudoku game made for short, relaxing puzzle sessions. Whether you have a few minutes to spare or want a calm number challenge, this game lets you jump straight into a classic 9×9 Sudoku board with simple controls and a focused interface.

Choose your difficulty, fill in the empty cells, use notes when you are unsure, and try to complete the puzzle with as few mistakes as possible.

How to Play

The goal is to complete the 9×9 Sudoku grid by filling every empty cell with a number from 1 to 9.

A valid Sudoku solution follows three rules:

• Each row must contain the numbers 1–9 without repeating.
• Each column must contain the numbers 1–9 without repeating.
• Each 3×3 box must contain the numbers 1–9 without repeating.

Controls

Mouse / Touch

• Select a cell: Click or tap an empty cell on the board.
• Enter a number: Click or tap one of the number buttons from 1 to 9.
• Notes: Toggle Note Mode to add candidate numbers instead of final answers.
• Erase: Clear the selected cell.
• Hint: Fill in one correct cell when you are stuck.
• Check: Check whether your current board has mistakes.
• New Game: Start a fresh puzzle.

Keyboard

• 1–9: Enter a number into the selected cell.
• Backspace / Delete: Erase the selected cell.
• N: Toggle Note Mode.

Features

• Classic 9×9 Sudoku gameplay
• Three difficulty levels: Easy, Medium, and Hard
• Built-in timer
• Mistake counter with a 3-mistake limit
• Note Mode for marking candidate numbers
• Hint system with limited hints
• Board checking feature
• Clear row, column, and box highlighting
• Touch-friendly controls for mobile play
• Responsive layout for desktop and mobile browsers
• No download required — playable directly in the browser

Recommended For

Quick Sudoku is designed for players who enjoy calm, logic-based puzzle games. It is easy to start, simple to understand, and perfect for a quick mental break.

Take your time, think carefully, and enjoy one puzzle at a time.