Printable Hard Sudoku

Set 1q2ehg5. 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 2 1 3
6 5
5 8 3 7 2
8 7
4 8 3
3 9 4 2 6
3 1 2
2 6 4 5
9
Hard #2
2 5 4 8
8 1
1 4 2 9
1 4 6
8 5 7
6 4 9
4 3 6 8
7 5 8
7 3 9
Hard #3
8 5 3
6 7 3 1 5
7
7 2 1
5 8 9 7
3
5 4 9 7
8 2
9 1 5 3 4 8
Hard #4
5 9 7 2
7 4 9 5
1 5 4
1 4 3 9
5 7
2 6
3 6
7 2 8 1
7 6 9 4
Hard #5
2 3
3 8 6 1 5
4 7 3 9 2
5 6 1 2 4
3 5 8 9
2
8 4
5
8 1 7 9
Hard #6
9 1 8
2 3 1
3 9 7 2
6 2 5
6 3 4 9
9 2 6
3 5 8
2 1 7 5
3 9
Hard #7
2 9 8
7
7 9 1 3
4 9 6
7 4 8 6
1 9 8 4
7 6 3 1 5
9 3 7
5 2
Hard #8
8 7 5 4 1
5 7
9 3 1 4
9 3 8
7 6 1
2 1 8
7 8 4 9
5 1 4 3
3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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