Learn the three rules
Every row, column, and 3x3 box must contain the digits 1 through 9 exactly once. A safe move must satisfy all three rules at the same time.
Practice: Before placing a digit, point to its row, its column, and its box.
Beginner guide
Sudoku for Beginners
Sudoku is easier to learn when you treat every move as a small proof. Start with the rules, scan the most-filled areas, and use notes only when a cell has a few realistic options.
Start with the fullest areas
Beginners make faster progress by checking rows, columns, or boxes that already have many numbers filled in.
Practice: Look for an area with five or more givens and list the missing digits.
Use notes only when needed
Candidate notes help when two or three numbers could fit. Too many notes too early can slow the solve down.
Practice: Add notes to one stuck cell, then remove notes after every correct placement.
Avoid guessing
A guessed number can make the puzzle look solved for several moves before the mistake becomes obvious.
Practice: If you cannot prove a move, scan a different row, column, or box first.
Best practice path
- Read the basic rules once.
- Open an easy Sudoku puzzle and solve slowly.
- Use hints only after checking the row, column, and box yourself.
- Move to medium Sudoku when easy puzzles feel predictable.
Frequently asked questions
Is Sudoku hard for beginners?
Sudoku feels much easier when you start with easy puzzles and focus on rows, columns, and boxes with many filled numbers.
Do I need math to play Sudoku?
No. Sudoku uses digits, but it is a logic puzzle rather than a math puzzle. You only need to track where each digit can legally fit.
What is the first Sudoku technique to learn?
Scanning is the best first technique. Check where a digit already appears and find the only square where it can go.