Printable Hard Sudoku

Set jzoay6. 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
7 6 2 5
4 8
3 6
6 4 5 1
2 5 6 7 4
8 9
2 3 5 6 9 7
7 3 8
9
Hard #2
6 9 7 5
1 9 8
4 2
4 7 6 3
1 3
5 6 4 2 7
8 1 9 2 3
5 8 6
9
Hard #3
9 4 3 5
2 7 8 9
9 5 8 7
7 5 8 9 3
2
1 9 8
1 6 3
2 9 4
2 4
Hard #4
4 5 2
6 1 8
9 7 4
8 7
5 3 4
3 9 1
9 8
1 6 3 9
6 9 4 8 2 5
Hard #5
2 6 8
7 4 8 1
1 5 6
9 3 6 2 4
4 7 5 6
3
8 1
2 3 1
5 7 4 8
Hard #6
2 6 9
7 9
5 1 3
7 3 4 1
8 3 7
1 6 5 4 3 2
6 7 1 5
8 2
4 1
Hard #7
6 1 4 2
1 5 2 6
6 1 9 4 8
4 3 8
5 3 7
1 6 9
4 5 7 1
9 7 2
Hard #8
3
1 8 6 4 5 2
1 6 4
9 7 5
3 1 7 9
5 8 3
2 4
8 6 2 4
5 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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