Printable Hard Sudoku

Set h86flo. 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 3
1 2 4 7
8 5 7 6 1
7 8 9
3 4 5 8
6 2 4
3 4 5 9
1 6 5 3
Hard #2
3 4 2 8
7 8
1 8 6 3
3 7 9
8 4 6
2 1 3
3 7 2
4 9 5 1 8
9 4
Hard #3
4 9 2 7 5
7 3 6
9 5 7 8
4 3
5 3 1 6 4
5 8
2 1
7 6 4
8 1 9
Hard #4
1 4 7 9
5 3 8
7 1 2
8 1
9 4 6
6 1 3 9 2
8 5 9
3 6 4 5
1 3
Hard #5
5 6 9 7
8 4
4 1 2 6
4 9 3 5
2 6 3
1 7
5 3 6 9 4
7 1 8
8 9
Hard #6
8
1 5 4
6 8 1 3
3 1
9 6
7 2 3 6
5 2 9 3 6
7 4 2 8
8 2 4 3
Hard #7
4 3 1
7 2 3
4 9 6
7 1 2
2 7 8 9 5
5 1 7
1
8 5 4 2
1 6 7 8
Hard #8
3 8 7 4
1 9 6
9 5 2
9 3 5 8
1 9 8 2
2
4 5 8 9 3
9 4
6 7 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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