Printable Hard Sudoku

Set 10aq4r7. 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
6 7 4 9
3 2
7 5 9 2
5 8 4 6
7 1 9 4
5 7
7 6 1
2 9 5
4 2 3
Hard #2
8 6 9 5
6 8
3 9 6 4
8
1 5
6 7 9 1 3 5
4 1 6
4 9 2
5 8 7 2
Hard #3
2 3 4 8
4 1 5
6 7 8 2 9
7 5 2 6
2 1 4 3
8 2 7
9
9 3 6
2 9
Hard #4
4 9 8 1 3 7
5
7 6 9 5
5 9 3 4
4 5
2 8 9
3 2
1 3 4 8 6
7 2
Hard #5
2 4 5
3 2 9
6 3 5 9 7 8
6 5
4 3 7 9
1 2
5 2 9 1 3
9 3 8
3
Hard #6
3 2 6
1 5 4
1 6 9 7
7 5 2 3 9
4 5 1
2 6 8
6 2 3
9 8 6
1 7
Hard #7
7 8
6 4 3
3
7 4
2 8 3 1 5
5 6 8 1 7 9
3 8 7 9
5 2 8
6 8 7
Hard #8
9 8 6
1 2
7 5 8
8 9 6
8 1 3
1 4 5 8
4 5 6 3 8
2 9
8 5 4 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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