Printable Hard Sudoku

Set yv0oaq. 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
2 5 4
4 3
7 2 6
6 2
9 7 4 6 3 8
8 1 5 6 7
7
2 9 4 1
5 1 8
Hard #2
6 1 9
6 1 8 5
1 5 4
3 8 4 5
6 5
1 2 4
2 4 7
4 3 6 7
8 7 3
Hard #3
7 8 9
6 3 8 4
5 1 6
1 3 9
9 3 8 6
8 1
2 4 6 8
7 5 3
3 6 7
Hard #4
1 7 6
5 3 8
6 1 3
5 2 6 3 8
7 5
3 8 5 1
3 6 5 2
1 8
6 9 7
Hard #5
6 3 7
3 2 7 8
4 5 3 6
8 3 7 5
2 4 7 8 9
9 6
4 3
2 1
9 1 4
Hard #6
8 5 4
1 8 2
3 5
4 3
2 3 9
7 4 5 2 6
2 1 4 8
6 7 4
7 8 2 9
Hard #7
2 6 5 1
8 4
1
7 1
5 3 9 8 7
8 6 7 5 4 3
5 2 9
9 3 6
1 6 7
Hard #8
8 7
1 4 6 9
7 1
8 5 6
3
5 2 1 9 8
5 4
3 9 4 5 1 8
1 4 6 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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