Printable Hard Sudoku

Set 54mnmz. 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
2 4
8 4 1
6 1 2
7 8 5
5 8 6
6 4 2 3 7
4 1 7 5 9
1 9 3 4
7
Hard #2
4
4 7 2 1
6 5 8
5 2 9 1
2 9 4 3 7
5 9 1 6
9 2
3 6 7
5 2 3
Hard #3
7 5 3 9
2 7 4
1 3
4 5 8
6 9 4 8 2
1 8 5
3 7 9 6
4 7 1 3 5
Hard #4
8 5
7 1 4
1 2 4 8
5
7 6 3 4 1 9
2 3 8
3 7
3 2 9 1 8
4 3 2
Hard #5
8 7 6
8 5
5 2
3 2 9 5
8 7 3
2 4 5 6
6 2 7 3
5 1 9
7 1 9 4
Hard #6
5 4 6 9
1 7
9 4 6
4 6 8 7 1
4
2 3 5
3 1 2 7
4 8 5
6 4 8 1
Hard #7
8 2
5 6 4 9
2 5 1
6 3
3 4 7 2 5
5 3 6
1 6
5 3 4
7 9 1 8 4
Hard #8
3 1 6
9 2 6 3 8 7
2 6
6 4 8
1 4 9 2
3 1 9
8 6 4
5 6
1 7 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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