Evil Sudoku to print (free PDF)
Download free evil Sudoku puzzles to print in PDF, ready for A4 or US Letter. The toughest grids we publish, for true Sudoku masters.
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
6
8
5
4
2
2
7
8
9
6
5
6
1
3
1
4
7
4
5
5
3
2
1
9
7
5
3
6
7
1
4
3
8
6
7
9
5
7
1
2
6
8
2
9
9
7
6
1
8
4
3
6
6
1
2
7
6
5
2
9
7
5
1
7
3
4
8
9
2
9
5
2
1
9
1
3
5
4
6
8
9
8
1
9
6
3
7
4
1
6
1
8
2
4
3
7
5
9
8
7
8
4
7
6
5
1
1
2
1
4
4
9
9
7
2
1
1
3
2
8
3
7
1
5
2
7
1
4
8
7
9
5
9
4
3
6
3
8
8
1
5
2
3
7
9
1
9
3
8
9
5
7
6
7
2
8
1
4
5
6
6
1
8
Why these puzzles?
An evil Sudoku gives the fewest clues — often around 22–24 — so every move counts. Expect to use full candidate marks and advanced techniques such as X-wing or forcing chains.
How to print
Pick how many puzzles and the paper size, then press "Generate PDF". Six puzzles per page by default; the separate solutions PDF has every answer.
Solving tips
Keep candidate notes meticulous and look for advanced patterns (X-wing, XY-wing, chains); a single missed elimination can stall the whole grid.
Frequently asked questions
How hard are evil Sudoku?
They are our hardest level: minimal clues and advanced techniques required, aimed at expert solvers.
How should I practise before tackling evil grids?
Get comfortable with hard and very hard first — evil assumes you already use X-wing, XY-wing and forcing chains.
Does every evil puzzle have a single solution?
Yes. Every PrintSudoku puzzle has exactly one solution, included in the separate solutions PDF.