Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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