Printable Hard Sudoku

Set 113t1hp. 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
7 5 4 1 3
8
2 3 7 5
3 4 7 2
6 8
9 3 5 4
2 7 9 3
1 8 2
2 6
Hard #2
2 8 9 3
4
7 9 4
4 6 8 3
8 5 6
2 9 3 5
5 4 1
4 5 8 6
3 6 2
Hard #3
3 6
9 4 7
4 1 3 8 7
2 5 9 3 7
1 5
6 2 5 9
4 5 3 6
1
9 5 3
Hard #4
9 8 6
1 2 5 7 9 8
7
7 6
3 1 4 2
1 2 9 8 5
8 9 3 4 1
1 8 2
Hard #5
6 1 7
4 8
7 5 3 6
1 4 7 3
3 8 6 7 9
2 1
9 3 8 2
8 1
6 9 5
Hard #6
9 1
2 4 9 6
8 1 2 5
7 4 6 9 8
2 7
1 3 8
4 1 2 3
3 5 6
2 7
Hard #7
7 3
1 5 8 3 7
8 2 4
7 8 9 6
2 1 6 7
9 4
5 6 2
6 5 8
3 1 9
Hard #8
7 1 9
7 2 6
1 2 7
7 9 2 4
4 5 6 9
6 8
8 4 5 7 1
5 9
3 7 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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