Printable Hard Sudoku

Set fe6vd7. 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
8 3 9 6
4 7 2
1 8
1 5 4 7 3
6 2 7 1 4
7 3 2
2 4 8 3
4
9 7
Hard #2
6 2
3 1
4 8 9
3 7 2 4
5 9 3 7
6 1
2 8 5 7 3
3 9 8 5
5 1 2
Hard #3
1 6 2 8
1 6
6 4 8 1 2
5 8
8 9 3 2 5
2 5 1
7 9
6 4
9 7 2 5
Hard #4
6 2 8 9
3 2 9 7 5
4 1 2
8 5 1 6
4 7
1 4 3 5
7 1 5 2
5 8
7
Hard #5
2 8
3 1 7 5 6
8 3 6 7
8 1
7 6 9 5 2
9 1 2 7
1 3 6 5
9 4 2
Hard #6
9 8 6 3 7
7 2
2 8 1 6
7 3 5 1
3 9 2 8 4
5 9 7
8
9 3 1
9 2
Hard #7
7 3 6
2 8 3 5 1
4 7
2 4 5 8
1 9
1 6 5 7
4 7 2 5
5 3
7 9 5
Hard #8
6 2 8
2 1 7
7 1
4 1 5
1 5 7
9 6 8 1 7
8 9 2
5 2 8 6
1 3 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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