Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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