Classic Sudoku

Classic Sudoku is the foundation of every Sudoku style. On SudokuFun you can play a classic 9×9 grid with smooth controls, smart hints, and a clean layout that works on any device. Begin on the Classic Sudoku board, then keep the momentum going with the Daily Challenge or the focused Easy Sudoku practice path.

Classic Sudoku Basics

The goal is simple: place digits 1 through 9 so each row, column, and 3×3 box contains every number exactly once. If you need a refresher, visit the How to Play Sudoku guide. Classic puzzles teach the scanning and elimination techniques that help you succeed in Medium Sudoku and Hard Sudoku challenges.

Because the rules are universal, every classic puzzle you solve strengthens the logic you will reuse in every other variant.

That foundation makes it easier to adapt to daily challenges, tournaments, and new puzzle styles.

Techniques That Work Every Time

Start with singles, then use candidate notes to narrow possibilities. Watch for pairs and intersection removals to unlock tough regions. The Sudoku Tips page walks through these moves in detail. Practicing classic puzzles consistently will make the advanced patterns feel natural in competition settings like Sudoku Tournaments.

Classic puzzles are also the best place to refine your speed. Try solving a grid, then immediately replay one on the Sudoku Daily Challenge Today page to see how your pacing changes. This loop keeps your fundamentals strong and prepares you for Sudoku Tournament Online events.

Play Now

Open the classic board and start solving immediately. You can also compare your time to the Sudoku Daily Challenge Today session or prepare for a Sudoku Tournament Online event.

Play Classic Sudoku

Explore Variants

Once you're confident, branch out into Killer Sudoku for cage-sum logic or revisit a relaxed Easy Sudoku puzzle to keep your rhythm strong. Mixing classic and variant play keeps your logic toolkit flexible.

If you want to build speed, alternate a classic puzzle with a timed run on Medium Sudoku or Hard Sudoku. That variety helps you stay sharp and makes the classic grid feel even smoother over time.