Printable Hard Sudoku

Set jd768f. 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
8 4 7
6 4 1
3 5 9 1
6 7 3 4
8 4 7
1 3
7 3
9 8 1 6 2
4 8 6
Hard #2
5 8 1 7
4 1 7 6
7 4 5
7 3 5 1
6 2 4
3 9
5 9
5 4 7 6
5 8 2
Hard #3
3 5 7
9 5
4 6
9 8 7 2
1 4 6 2 9
1 3 6
9 6
3 6 7 8
2 5 7 4
Hard #4
7 4
3 5 4 7 2
2 9 1
4 5 3
2 9 6
8 3 5 1
6 5
2 4 7
4 6 1 2
Hard #5
5 3 8
8 1 6
2 5 9
2 6 5 8 7 4
3 4
9 2 1
1 3 7 9 4
5 3
6 8
Hard #6
1 7
2 8 5 1 3
5 2 9
3 7 5
7 4 9
6 1 8 3
2 3 4
8 1 2 7
1 7
Hard #7
7 3 2
1 5 9 8
9 2 7
2 6 9 7
1 4
8 3
5 6 1
3 4
4 8 1 6 2 5
Hard #8
4 2 3
8 7
5 7 2 9 4
9 8 2 1
1 3 7
2 4 8 6
1
9 8 4 3 1
3 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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