Printable Hard Sudoku

Set jg2q6s. 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
1 5 8 6
9 5 3 6
2 8
7 9 8 3 5
3 1 4
8 1 4 2 3
9 6 5 1
7 6
Hard #2
8 4 5
1 6 4
5 7 9
5 4
3 8 2 4
7 6 3 1
5 2 1 6 3
3 2 8
9 3
Hard #3
3 1 6 9 8
2
9 3 2 8 6 5
9
8 2 6 7
6 7 4 9
2 4 7 1
4 8
9 3
Hard #4
8 1 2
2 7 6
5 1 3
7 9 3 8
3 2 4 9
8 5 4
7 9 1
9 2 1
8 6 7
Hard #5
2 3
1 4 2 7
2 3 8
6 9 1 8 7 3
8 9
4
5 7 6
4 9 5 6
8 1 4 9
Hard #6
2 1 5 4
8 1 2 3
6
6 4 9 1
1 9 8 3 4
7 8
3 1 5 8
7 6 2
2 7
Hard #7
4 6
2 7 3 4 9
5 8 7 6
2 7 6 8
8 3 6 4
4 1 9
7 5 1
4 2
8 1
Hard #8
6 3
3 9 4
4 7 5 8 3
8 9 1
5 1 2 7
7 9 8 2
4
8 5 6 1 3
3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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