Printable Hard Sudoku

Set 1x98fyz. 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
6 7 1
3 5 7 4 1
2 4
4
8 2 1 6 9
5 7 1 2
5 1 7
1 3
3 9 6 8
Hard #2
3 6 2
4 9 1
5 2 9
9 6 7 2
5 8 1
7 3
9 8 4 5
8 4 6 3
5 8 9
Hard #3
7 3 6
5 4 7
3 9 4 2
4 9 8 6
1 3
6 4 5 1
6 7 5
3 5
8 2 7 4
Hard #4
1 5 3
4 3 2 7 5
7 8 1 4
5 4
2
4 7 8 1
3 4 6 7
6 4
1 3 9 2
Hard #5
6 7 9
8 6 1
9 7 2
5 7 8 1
3 4
8 1 7 2
5
3 7 9 8
5 9 3 6 2
Hard #6
1 9
2 1 4 6 3
4 9 3 5
7
6 8 5 9
9 6
5 9 1
4 8 3 2
9 4 3 1
Hard #7
2 7 3 1 4
6 8
1 8 4 9
3 4 1 8
1 4 9 7 6
9 4
8 3 1 5
7 6
5
Hard #8
9 2 8
1 2 6
3 8 5 9 4
3 1 6
7 4 5
9 1 5
8 9 4
7 8 6 3
3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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