BEGINNER · START HERE
Sudoku for beginners
You do not need to begin with expert 9×9. Learn one rule at a time on smaller boards, then move into classic Sudoku with confidence.
Recommended path
Learn the rule on 4×4 easy, practice notes on 6×6 normal, then move into 9×9 easy.
- Step 1: 4×4 easy for rows, columns, and boxes
- Step 2: 6×6 normal for notes and hidden singles
- Step 3: 9×9 easy for the classic board rhythm
Why beginners get stuck
Most stalls come from guessing before candidates are reduced. Leave uncertain digits as notes and wait until a cell has a clear reason.
Finish before chasing score
At the beginner stage, a clean completion matters more than speed. Fewer mistakes make personal bests and clean-run bonuses easier.
Practice order
- Start on 4×4Learn the no-repeat rule on a compact board.
- Use notesKeep uncertain digits as candidates instead of guessing.
- Find singlesLook for cells with only one candidate left by row, column, and box.
- Move to 9×9Apply the same process on the classic board.
Find your first 9×9 Naked Single
Step 1 of 4
A 9×9 board with only row 1 column 1 empty. Bigger boards still start the same way — look at the most-filled unit first.