Printable Hard Sudoku

Set ewm4su. 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
7 6 3
5 9 2
3 9 5 4
4 8 9
2 3 8 6
3 1 4
8 1 6 7
5 2 8
9 8
Hard #2
3 5 9
5 9 2 8
8 3 7 5 4
8 1 5
7 9
4 3 2
2 3 1 7 4
4 3 6
9
Hard #3
5
1 3 8
4 2 8 1
9 1 2 4
5 4 8 3
7 5
2 6 4 5 9 1
9 3 6
2 9
Hard #4
2 5 3 7
1
4 1 7 5 9
4 7 1 3
7 6 8
8 5 2 9 3
8 2
7 9 6 4 5
Hard #5
7
3 4 9
7 9 8 1
5 7
4 9 2 6
2 6 8
1 2 8 9 3
9 3 4 2
8 5 6
Hard #6
8
6 5 1 9
3 2 4 1
5 1 9 2
6 3
8 4 9 6
5 2 4 8 9 7
7 9
2 1
Hard #7
9 5
9 8 5 1 4
1 6 4 3 8
1 6 7 5
7 1 3
3 8 9 2
9 2 5
8 9
3
Hard #8
5 9
3 1 2 5 4 6
5 8
4 2 6 1 8
2 6 9
8 7
1 9 8 2 4
3 9 7 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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