Evil Sudoku to print (free PDF)
Download free evil Sudoku puzzles to print as PDF, ready for A4 or US Letter. The toughest grids we publish, for true Sudoku masters.
Sample puzzles
9
5
2
1
6
8
3
2
2
1
5
4
3
2
6
7
3
1
4
6
9
9
5
9
8
3
9
2
1
8
5
8
4
5
7
6
1
8
2
3
9
3
5
1
3
7
5
6
2
4
2
1
6
4
7
5
3
7
1
9
3
4
2
8
4
2
7
9
5
1
3
3
2
6
7
8
7
1
2
9
1
3
6
5
8
7
3
8
5
8
9
6
4
8
4
5
6
2
7
5
1
6
3
8
8
9
5
2
3
2
4
5
7
6
5
4
1
8
9
8
4
7
5
6
9
5
8
9
6
7
1
4
9
1
5
2
8
1
8
7
2
7
9
3
3
6
1
4
8
2
Why this level?
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
Click "Download book", open the PDF and pick A4 or US Letter. Six puzzles per page; 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.