From 6×6 to the big sudoku
From around 8, many children can solve their first 9×9 sudoku – the classic sudoku with 81 squares, nine 3×3 boxes and nine symbols. On “Easy”, 40 to 45 squares are given. That’s a lot of help, but the puzzle is still much bigger than anything before.
So a first 9×9 is allowed to take longer and be solved in stages. On paper, it’s easy to take a break and carry on later.
Strategies for the 9×9
- Number by number: go from 1 to 9 and check for each number which boxes are still missing it and where it can go.
- Only one option: for an empty square, rule out every number already in its row, column and box. If only one is left – write it in.
- Pencil notes: write possible numbers small in the corner and erase them later.
- Busy areas first: rows or boxes with many clues bring the quickest wins.
Tips for parents
- Start with pictures if numbers put them off: the 9×9 also comes with animals – the logic is the same.
- Newspaper sudokus are often too hard: for a first try, a kids’ 9×9 on “Easy” with lots of clues works better.
- Solve together: take turns filling in a square and explain why each time.
- Keep going: in level mode the 9×9 starts at level 201, and the daily sudoku has a new one every day.
If the 9×9 doesn’t click yet, 6×6 on “Hard” is a good bridge – see sudoku for 7-year-olds.
Sudoku for 8-Year-Olds – printable PDF worksheets
Each PDF has 6 puzzles on A4 paper and the answers at the end – just tap, download and print.
Frequently asked questions
Isn’t a 9×9 sudoku too hard at 8?
On “Easy”, with 40 to 45 clues, many children this age can do it – especially after some practice with 4×4 and 6×6.
Numbers or pictures for the 9×9?
Either works. Numbers are easier to scan; pictures are often more fun for younger kids. Online you can switch at any time.
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