Printable Hard Sudoku

Set wn72fv. 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
5 8 7 9
6
3 2 1 5 7
4 1 2 8
8 3 1 2
3 4
4 5 2 3
8 3 6
7 9
Hard #2
3 4 1 8
8 1 7 2
5 3 4 1
6
1 8 4 9
9 4
7
6 2 8 1
4 5 7 2 9
Hard #3
3 4 7
6 8 2 4 9
9 1
9 5 1 6
1 3
9 4
7 5 1 2
6 8 2
6 4 5 3
Hard #4
6
1 4 7
3 5 9
8 1 2 4 3
2 3 6
7 5 6
3 4 9 8
9 7 6
6 2 9 1
Hard #5
4 5
1 9 6 8
1 3 7
4 6 2 7
5 8 6
5 8 1
7 4 2 8
7 6
9 2 8 4
Hard #6
1 5 8 7
2 8 1 4 5
4 9 5
7 5 6 2
4 2 3
9 6 8 4 2
9 5 1
2 8
Hard #7
2 5
7 3 2 6 9
4 3 2
1 6 8
9 6 3 7
4
7 9 3 8
5 8 7
8 5 2 1
Hard #8
4 2 7 8 9
3 6 7
5 9
7 8 3 4
9 5 1
1 6 5
1 6
7 4 2 6
4 2 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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