THE NUMBER PUZZLE

The Number Puzzle is a free online Sudoku game where you fill a 9×9 grid with numbers 1 through 9, making sure every row, column, and 3×3 box holds each number exactly once. It's the classic Sudoku logic challenge you know, running straight in your browser with zero installs required.

The game covers four difficulty levels – Easy, Medium, Hard, and Expert – so you can ease in as a beginner or put your skills to the test with brutal Expert grids. A built-in timer tracks how fast you solve each puzzle, which makes replaying the same difficulty level genuinely competitive against yourself. Stuck on a tricky cell? Use the hint system to nudge you in the right direction, or hit undo to roll back a wrong move without starting over. Controls are clean and responsive, keeping the focus on the logic rather than fighting the interface.

If you enjoy free number puzzle games, brain training games, or classic logic puzzles online, this one covers all of it. It's a solid pick for students looking to sharpen concentration, adults who want a daily mental workout, and anyone searching for Sudoku games to play without downloading an app. Whether you call it a number grid puzzle, a math brain game, or just Sudoku, The Number Puzzle delivers a straightforward, satisfying challenge every single session.