Classic Number Puzzle Sudoku

Game Introduction

Classic Number Puzzle Sudoku is a free online logic puzzle that challenges players to complete a 9x9 grid. The goal is to place the digits 1 through 9 in every row, column, and 3x3 zone without repeating any number. This version is built with modern web technology, so it runs smoothly on any device with a browser, including desktop computers, tablets, and smartphones. The design is clean and minimal, helping players focus on the puzzle. A timer is included for those who enjoy tracking their completion time. The game offers four difficulty settings, making it suitable for newcomers and experienced solvers alike. All content is family-friendly and appropriate for players of any age.

How to Play

To begin, choose one of four difficulty levels: easy, medium, hard, or expert. A 9x9 grid appears, divided into nine 3x3 boxes. The puzzle starts with some numbers already filled in. Your task is to fill the remaining empty cells with numbers from 1 to 9. Each number can appear only once in any row, column, or 3x3 zone. Select an empty cell, then pick a number from the available options below the grid. The game automatically checks for errors and tracks your time. The rules are simple: no duplicates in any row, column, or zone.

Game Features

Features include four difficulty modes that range from beginner-friendly to challenging. The game uses HTML5 technology, which allows it to work on any device without needing to install software. Full-screen mode is available for an immersive experience. A built-in timer lets you monitor your solving speed. The interface is clean and uncluttered, with no distracting elements. All content is designed to be safe and appropriate for family use.

Tips for Success

Start with easier puzzles to learn the basic logic. Look for rows, columns, or zones that already have many numbers filled, as these are simpler to complete. Use elimination: if a number can only fit in one cell of a row, column, or zone, place it there. Practice regularly to improve your speed and pattern recognition. If you get stuck, take a short break and return with a fresh perspective.

Compatibility