Printable Hard Sudoku

Set eoaqjr. 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
2
5 7 1 2
4 1 8 6 5 3 9
8 2 9 5
7 5 6 1
5 2
3 1 4 6
8 6 7
Hard #2
1 6 4 2
9 3
8 5 4 7
7 3 8
4 9
1 3 4
9 5 7
3 2 9
2 4 7 3 1
Hard #3
6 8 2
5 7 9
8 3 7 5
2 7
1 8 9
4 8 1
6 7
1 3 2 9
3 2 9 7 5
Hard #4
3 7 9 1
8 6 5 2 3 7
5 8
1 4 6
7 6 5 9 8
3
9 4 7
1 4
1 7 5
Hard #5
9 4 1
5 3 1 6 2
6 1 2 9 4
9 7 8
2 7 5
5 6
8 3 6
2 9 5 3 7
Hard #6
1 7 3
2 1
4 8
7 5 1 3 9 4
9 4 5 8 6
3
9 8
5 8 3 9
7 6 1 2
Hard #7
5
4 6 7
9 7 1 6 8 5
9 2 7
4 7 1 9 6
3 1 8
1 3 4
7 4 5
2 7
Hard #8
5 8 3
6 5 1 4 9 7
8 4 3
7 9 4 6 1
7 3
1 2
2 4 7 5
8 9 5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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