Printable Hard Sudoku

Set j07sir. 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
9 1
6 3 9 7
9 8 2 3
1 7 6 8
2 1 4
4 6 9
9 5
7 4 2
4 6 7 2
Hard #2
8 1
2 1 6
9 2 7 6
4 8 1 7
5 1 8 2
6 9 7 8 2
5 4 3
3 7 8
6
Hard #3
3 2 6
1 9 3
2 8 7 4
4 3 5 6 2 9
9
6 9 7
4 8
1 6 7 5
9 7 3
Hard #4
5 8 2
1 2 6
3 9 7 5
4 7
6 1 2 3
2 9 6
8 9 6 2 1
8 3
4 1 7
Hard #5
7 2
6 9 3 1
2 5 1 6 4
3 2
5 3 8
2 9 1 3
1 9 3 6 5
6
5 2 9
Hard #6
6 4 1 3 5 8
8 5
2 5
3 9 7 2
9 3 8 4 6
1 7
5 6
1 6 8 5 2 9
Hard #7
1 7
2 5 8 9
9 7 6
4 8 7
5 3 2 6
6 4
6 4 7 2
1 8 6 3
1 2 8
Hard #8
2 3 1 8
7 9
5 2 4
9 7
4 5 1
2 6
7 5
3 2 6 1 4
5 4 2 6 3 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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