Printable Hard Sudoku

Set 273vq3. 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 8 6 7 2
7 1 4
5 6
1 9 8
6 3 1 7
4 3
1 8 4 2
9 5 8
6 1 9
Hard #2
6 9 4 8 1 3
8 4
4 3 7
7 6 8
7 2 3
3 9 5
3 1 8 5
2 6
8 9 3
Hard #3
9 3 2
3 9 8
2 4 9 1 3
6 7
6 5 2 8
4 1
9 1
7 5 3
8 7 9 5 1
Hard #4
1 7 3 2
5 1 4 8
3 2 1
6 3 7
8 2 7 1
1 9
6
5 3 4 7
9 8 1 3
Hard #5
9 1 4
1 9 5 3
2 4 5
9 8 7 2
6 8 4
2 3
8 4 5 1
1 6 2 7
2 7
Hard #6
7 6
1 4 7 8
8 5 3
2 6 7 4
3 9 1
4 9 1
9 1 3 8
5 2
7 1 9 3
Hard #7
8 6 2 1
6 2 9
3 9 1 2
8 7 6
3 6 5 1
1 2
9
4 6 3 9
5 3 2 8
Hard #8
5 3 7
7 2 6
8 7 4 5
6 9
7 2 4 6
3 1 4
3 1 9
6 8 9 2
5 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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