Printable Hard Sudoku

Set ki0y4e. 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
9 7
4 1 9 8
9 8 3 2 1 6
6 7
5
4 6 9 1 8 2
3 7 5 2
1 2 6
6
Hard #2
2
2 4 5
4 6 2
9 2 6 4
1 9 8
1 4 7 6
2 7 8
8 6 7
1 3 9 6 5
Hard #3
4 9 3
2 9 6 7 4
4 3 1
5
8 7
7 1 8 9
3 7 8 5
1 2 5 8
5 9 1
Hard #4
4 9
8 7 6 1
9 3 6
8 2 4 7
6 3 1
1 2 3
2 5 8
3 4 8 6
6 7 3
Hard #5
4 2 8
5 9 8 1
8 1 3 4 5
1 5 3
2 6 9
2 4 1
4 3 8 2
7 9 3 8
Hard #6
8 7 3 2 6
4 8
8 4
8 7
7 2 6 1 8
1 7 8 6
1 5 9
9 3
3 5 7 2
Hard #7
8 5 4 9
9 6 5
9 3 2
2 9 8 3
1 2 7
4 7 3
3 6 2
5 3
7 9 6 4
Hard #8
8 2
9 1 6
2 3 4 1
5 1 7 4
4 5
7
3 1 7 8
9 6 4 3 7
3 6 9 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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