Sudoku X to print (free PDF)
Download free Sudoku X to print as PDF, ready for A4 or US Letter. The diagonal variant that adds two extra lines to solve.
Sudoku book (PDF)
Download the free sudoku book in PDF: 20, 60 or 120 puzzles, with the solutions in a separate PDF. Ready to print on A4 or US Letter.
What to print
Orientation
Content
Sample puzzles
1
2
3
4
5
6
6
4
3
2
7
8
1
2
3
4
5
6
5
7
3
8
6
9
1
1
2
3
4
5
6
3
2
7
8
5
1
2
3
4
5
6
1
7
8
3
4
2
1
2
3
4
5
6
7
7
7
4
6
8
1
2
1
3
4
5
6
6
4
7
8
5
Why these puzzles?
In Sudoku X the two main diagonals must also contain the digits 1–9 without repeating. Those extra lines give you more clues to exploit — and more traps to avoid.
How to print
Click "Download book", open the PDF and pick A4 or US Letter. Six puzzles per page; check yourself with the separate solutions PDF.
Solving tips
Use the diagonals as two bonus units: scan them just like rows, columns and boxes for forced placements.
Frequently asked questions
How is Sudoku X different?
It adds the rule that both main diagonals must also contain 1–9 exactly once.
How do I use the diagonals in Sudoku X?
Treat each main diagonal as an extra unit: scan it for forced placements just like a row, column or box.
Are new Sudoku X puzzles added regularly?
Yes. We publish fresh puzzles daily, so the Sudoku X book draws on a growing archive.