Printable Hard Sudoku

Set 1tezr5. 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
5 8 7
8 3 7
5 6 9
5 3 2
4 7 1
2 6
2 9 8
7 4 8 2 6
4 2 3 1
Hard #2
1 5 6 4 3
3 6 9 7
9 1 5
4 7
9 7 1 4 8
3 8 5
3 9
7 8 3 5
5
Hard #3
9 1 8 5
6
5 4 7 1
7 1 2 4
4
6 9 2
2 8 5 9 3
2 8
3 1 2 9 7
Hard #4
5 1 8 7
3 8
3 9 2 6
7 5 9
1 8 3 4
6 7 1
8 3 6
2 4 9
7 5 2
Hard #5
8 3 9
6 2
2 7 8 4
4 7 1 2
5 8 3
7 1
8 6 4
5 2 8
2 3 8 9 7
Hard #6
1 5
7 1 6 8
8 7 9 6
4 3 8 9 7
6 7 8
7 6 4 3
6
2 7 5
8 3 9
Hard #7
8 2 3
9 2 5 1 8
5
8 3 2
2 4 9 8
3 5 7 2
9 6
2 6 7 8 9 1
1
Hard #8
3 7 5
7 1 6 8
3 7 9
3 5 6
1 8 7 5 4
6 2
6 8 4
7 2 5 1
4 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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