Printable Hard Sudoku

Set eet3yf. 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
6 8 3 9
9 1 3 4 5
2 1
1 5 4 7
7 4 9
3 2 1
1 8 4
4 3 2
2 6
Hard #2
6 5
4 7 5
9 1 8 3 4
4 8
8 4 9 7
5 6 9
3
9 5 2 6 7
6 7 4 8
Hard #3
6 7 3 8
9 8 1 7
3 8 4 6
5 7
9 8 6 5
8 9
2 3 5
8 4
1 4 2 9
Hard #4
7 9
2 4 3 7 6 5
8 1 4
6 8 4
2 8 7 4 9
7 3
6 2 5 8
3 5
9 8
Hard #5
8 4 2
7 9 3 6
4 1 7 9
7 1 5
1 2 7
7 3
7 6 5 9
8 3
9 6 8 4
Hard #6
4 2
8 3 7
9 8
3 6 9 4 1
3 2 5
6 4 3
4 5 1 6
9 8 1 5
1 6 4
Hard #7
3 4 8
3 7 9
7 6 3 4
1 9 6
9 5
3 1 8
4 8 3 2 6
6 8 2
7 6 5
Hard #8
5 7 4 3 8
3 6 1 9
3
5 8 9 3
1 9 4
6 3 5 8 7
5 7 2
4 6 5 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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