Printable Hard Sudoku

Set j35wl9. 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 3
4 3 7 6
3 2 6 4 5
1
6 3 4 9 5
7 4
2 7 1 8
1 3 9
8 2 4
Hard #2
8 5 6 7
2
2 4 1
8 9 3
4 8 9
9 1 2 5
5 2 1 3 6 9
7 3
4 9 2
Hard #3
3
7 2 1
9 5 6 4 2 8
7 2 8 3
2 1 6 4 5
5 7 2
1 9 3 6
5 1 4
Hard #4
7 1 4
9 1 8 3 6
5 3 7 8 9
4 9
2 5
3 4 6
6 9 3 2 8
2 1
7 2
Hard #5
9
6 9 8 4
6 7 8 2
4
1
7 9 2 5 8
3 7 6 9
4 2 9 1 6
6 9 5 2
Hard #6
4 7 6 5 3
1 6 9 8
9
4 1 2
2 6 4 9
8 3
7 2 6
8 2 3 5
5 1 7
Hard #7
3 8
6 7 5
9 7 2 1 6
7 9 8 5 1
8 9
6 1
7 8 4
5 4 3 9
8 6 2
Hard #8
5 6 3 2
8 9
3
4 7 2
7 8 5
7 6 1
9 4 7 3 2
5 1 8 6 9
6 2 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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