About Sudoku Classic
Nine rows, nine columns and nine boxes make up the grid in Sudoku Classic, the number puzzle in its purest form. Starting from a handful of given digits, you fill every empty cell so that 1 through 9 appear exactly once in every row, column and 3x3 box. No arithmetic is required, only careful logic and elimination.
Difficulty runs from easy all the way to expert, so you can start gently and step up as your solving improves. A hint system is there for when you've truly hit a wall, and auto-save means you can leave a half-finished grid and come back to it later. The clean interface stays out of your way on both desktop and mobile, making it ideal for a focused coffee-break puzzle or a longer session spent sharpening your concentration.
How to play Sudoku Classic
- Choose a difficulty, from easy up to expert.
- Select an empty cell and enter a number from 1 to 9.
- Make sure no number repeats within any row, column or 3x3 box.
- Fill the entire grid correctly to solve the puzzle, using a hint if you get stuck.
Sudoku Classic controls
| Input | Action |
|---|---|
| Click / Tap a cell | Select it |
| Click / Tap a number | Enter it in the selected cell |
Tips and tricks
- Scan each 3x3 box for numbers that can only fit in one cell, then lock them in.
- Look for rows or columns missing just one or two digits; they're the quickest to finish.
- If a digit already appears in a row or column, it can't appear there again, which narrows the options in neighboring boxes.
- Save hints for when you've run out of logical moves rather than using them to skip ahead.
Sudoku Classic FAQ
What difficulty levels are in Sudoku Classic?
Puzzles range from easy to expert, so it works for beginners and seasoned solvers alike.
Will my progress be saved?
Yes. The game auto-saves, so you can return to an unfinished puzzle.
Do I need to be good at math?
No. Sudoku uses numbers as symbols, and solving it is entirely about logic and elimination.
Can I play Sudoku Classic for free?
Yes. Sudoku Classic is free to play in your browser on The Pizza Edition – no download, install or account needed. Some partner games show a short ad before or between rounds, which keeps them free.
Does Sudoku Classic work on Chromebook and mobile?
Sudoku Classic runs in any modern browser on Chromebooks, Windows PCs and Macs. It is designed for keyboard and mouse, so it plays best on a laptop or Chromebook rather than a phone.
