Printable Hard Sudoku

Set z6g7tk. 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
7 5
4 5 2
2 5 4 6 7
2 8 1
7 6
1 6 2 9
2 3 7
7 8 9 3 6
4 8
Hard #2
9 6 1
2 4 9
6 9 3 4
1 2 8
2 9 5 4
3 6 7
3 5 8 6
5 1 8
4 1
Hard #3
3 1 7
1 5
5 7 4
2 5
1 7 2 4 9
8 6 3
8 6 9
8 5 2
9 4 6 7 3
Hard #4
3 8 5
2 8 9 7 6
6 1 8
4 1 5
5 9 8 6 1
3 4
1 3 7
1 2 6
8 3
Hard #5
7 9 8
5 3 9 4
6 8 4 7
4 2 5
3 1 4 2 9 6
2
6 3
8 4 6
7 1 2
Hard #6
8 4 9
4 2
1 3 6
5 6 9
6 9 4 8 5
3 2
2 3 8 6 7
9 6
8 5 9 2
Hard #7
2 1 7
3 1 5
5 2 9 4
3 4 9
9 7 6
6 4 2 8
6 9
1 5 3 4
2 3 8
Hard #8
5 1 3
2 8 5
8 7
3 4 6
7 5
2 9
6 5 9 3 8
4 1 8 2 9 3 6
3 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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