Printable Hard Sudoku

Set mjx3eq. 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 2 8
5 3 1 6
3 7 9 5
3 8 6 1 7 2
1
8 6
4 7 1 3
9 2 5
2 7
Hard #2
9 7 4 5
8 4
1 5 7 2
2 9
2 5
4 1 3 9
6 7 9
3 2 6
8 2 4 7 3
Hard #3
9 6 2 5
6 2
7 1 3 8
4 3 2 7 6
7 5 6 3
2 4
1 5
9 4 1
2 7 1
Hard #4
8 1 4
4 2 3 9
6 7 8
8 5 4
3 4 2
9 5 8 7
6 1 7
1 3 5 2
2 3
Hard #5
9 7 6 5
4
3 4 7 1 6
1 5 3 7
2 8 3
9 6 4 7 5
1 6
8 9 1
3 2
Hard #6
5 4
7 2 1
2 6
1 4 9
9 3 6
6 4 2 7
4 7
6 8 4 5 7 3
1 7 3 9
Hard #7
8 5 2
7 6 3 9
5 7 8 3
3 8 6 2
1 4 5
2
4 6 3
2 3 1 6
4 6 9
Hard #8
9 1 3
3 2 6 9
8 1 4
9 5 4 8
2 1 7 5
7 3 1 9
7 2 4
4
1 7 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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