Printable Hard Sudoku

Set hro3j6. 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 2 9 4
8
6 5
6 7 8
3 8 7 9
7 1 5 2
1 9 8 5
5 1 3 6
4 3 7
Hard #2
8 2 6
3 5 8 2
7 1
9 1 5
6 8
4 1 7 8 3
9 6 5
4 5 7
7 2 3 4
Hard #3
9 5 6
1 4 6 9
9 8 4
5 2 3
3 4 2 7 6
2 3 7
3 6 1
1 6 2 7 5
Hard #4
9 7 4 2
6 8 5 4
8 2 1 5 3
6
4 2 7 8
3 5 2
9 1
1 5 7 2
3 2
Hard #5
8 3 7
1 9 6 8
9 4
5 1 6 2 3
6 2
2 4 9
9 7 2
3 7 4 9
6 5 1
Hard #6
2 3 4 6
1 8 2
7 9 6
5 7 4 9 6
6 4 3
1 8
3 9 8 1 2
2 4
7 8
Hard #7
2 7 6 5
1 3 8 2 4 7
3 8
2
3 1 7
6 8 1
2 4
6 7 4 1 3 5
9 6
Hard #8
6 5 9
8 9 7
7 1 3
3 5 6 2
5 2 3 1
1 9
8
8 4 9 3
4 5 7 8 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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