Sudoku - Classic Sudoku Puzzle

Abstract

Sudoku - Classic Sudoku Puzzle is a mobile version of the standard 9×9 number-placement puzzle, with boards arranged for different levels of difficulty. It suits newcomers who want guided practice as well as experienced players looking for harder puzzles, note-taking tools and daily goals.

How it works

The game offers four difficulty levels: Easy, Medium, Hard and Expert. Players can enter candidate numbers as notes, use an eraser, undo moves and request hints when they are stuck. An auto-check option can identify incorrect entries, while mistake settings let players choose how strictly errors are handled.

A number-first entry mode is available for placing the same digit in several cells. Notes can also be updated as the grid changes, reducing the need to remove candidates by hand. These options make the app more forgiving for learners without removing the underlying logic challenge.

Extra features

• Daily challenges for regular play
• Trophies and progress tracking
• Dark theme for lower-light sessions
• Controls for hints, undo and erasing entries

Who it is for

This is a broad-purpose Sudoku app rather than a specialist training tool. Beginners can start with simpler boards and optional assistance, while regular solvers can move through the higher difficulty levels and use notes to work through more involved grids. The clean layout keeps the puzzle itself central, with digital conveniences that are not available on paper.

Published by Guru Puzzle Game in the Puzzle category, it has a rating of 4.76 from 548,956 reviews and more than 10 million installs. Those figures indicate a large and generally positive user base, though they do not replace checking whether its preferred controls and assistance settings match your solving habits.