Printable Hard Sudoku

Set 1dj1h62. 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
3 6 8
2 6 1 3
9 1 8 5
7 5 6 3
2 5 7
6 1 9 2 4
5
6 1 2 9
3
Hard #2
8 2 5 6
9 8
5 2 3
4 1
7 5 1
1 5 7 4
4 1
9 5 6 8
3 5 6 4 7
Hard #3
1 4
3 9 6
6 7 1 3
4 1 7
8 2 3 5
5 9 3 1 6 7
5
5 4
2 6 3 7
Hard #4
7 2
7 2 1 4
1 5 6
1 4 2 5 7
5 1
2 4 9
5 6 4 3 7 1
7 5 6
5
Hard #5
4 1 6
5 3
6 2 1 8
9 3 8
3 6 8 2
2 9 4 1
1 5
5 9 3
4 1 6 7
Hard #6
7 1 4 6
1 2
2 5 4
4 9 6 1
8 6 2
2 6 8 3 5
4 5
5 3 4 7 9 2
Hard #7
8 2 3
7 1 3
8 1 4
7 9 5 1 2
4 5
6 2 9 5 4
1
4 3 6 8 9
8 1
Hard #8
6 5 1 7
9 8 2
1 2 3 5
7 1 2 5 6
3 4
9 1
5 9
1 6 8
2 1 3 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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