Printable Hard Sudoku

Set y6gj2t. 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 9 8 7 2
1 4 7
4 9 8 3
8 2 6 4
3 4 7 1
2 9
9
7 4
7 1 6 4
Hard #2
7 8 9 5
5 4
2 6 8
8 9 4
1 9 8 7
6 3 1 7 2
3 5 2 1
4 3 8
2
Hard #3
8 5 7 6
4
9 1 4
7 4 5
3 8 7 4 9
2 9 1 7
7 2 9
5 4 1
2 6 4
Hard #4
4 8 1
5
7 6 1 8
2 9
9 8 1
8 1 4 9 7
2 6 9 5
3 4 7 6
5 4 7
Hard #5
1 9
2 5 8
1 8 9 7
6 4 8 3 7
7 9
5 7 2 1
9 1 2
4 6 5
2 4 3
Hard #6
3
5 9 4
3 9 2 5
9 7 5
6 2
2 8 3 4
8 7 2 4
3 1 4 9
4 8 5 3
Hard #7
2
5 8 2 3
1 9 4 7
2 1 6 5 3
8 9 4
4 5 8 3 1
8 5 4 3
3
7 5
Hard #8
7 2
6 9
9 4 3 8
5 6 1
1 4 9 3
6 3 7 4
4 1 5 8 7
3 6 1
2 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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