Printable Hard Sudoku

Set zjfys8. 8 puzzles with an answer key, ready to print.

Hard puzzles start with about 29 givens and need real techniques: pointing pairs, naked pairs and hidden pairs. Paper is a great way to practice them, because you have to keep your own notes honest.

Each free PDF has 8 puzzles, four to a page on US Letter paper, plus an answer key with every solution. Every puzzle has exactly one solution. A new set appears here every day, or you can grab a different set any time.

Puzzles in this set

Hard #1
9 5
1 3 7 4
4 6 5
8
7 4 6 9 1
2 3
1 9 8 6
3 4 7 1 9
3 2 4
Hard #2
8 5 7
4 3 6 2
5 4 9
3 8 5 7
5 8 6 3
7 1 9
2 4 6 7
1 3 5
4
Hard #3
9 4 7 1
4
4 1 9 6
4 8 3 5
6 9 2 4
7 8 1
5 3
9 5
1 3 7 5 2
Hard #4
4 1 3 5
9 8 2 3
7 3 6
4 9 3 2
1 6
6 4 9 5
4 2 7 8
2
8 1 9
Hard #5
9 5 4 8
4 7 9 1
8 6 7 3
9 3 5
4 8
2 8 6 1
9 2 5
8 4
5 6 7
Hard #6
9 1 5
4
2 8 6
5 8 2 1 3 9
4 9 7 2
3 2 9 5
5 3 8
6 2 7
4 5
Hard #7
1 9 4 3
3 9
8 4 1 5
7 6 8
4 2 7 9 3
2 6
1 2 4
7 5 3
5 9 8
Hard #8
6 3
7 5 2 1
3 1 5 9
3 1 8
4 3 7
4 5
2 9 8
8 3 6 2 4
4 5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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