Printable Hard Sudoku

Set 1ym0sb8. 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 9 3 6
4 8 2
1 7 6
9 6 7 5 4
1 7 3
8 1 9 5
9 1 7
3 9 5
2
Hard #2
2 1 3
6 3
4 7 1
1 5
4 7 6
9 2 3 8
5 1 3 4
3 1 2 5 7 8
9 2
Hard #3
8 6 5 3
4 3 2 6
7 5 1
5 9 4 1
3 7 6
7 1
4 7 5 2
8 3 7
3 9
Hard #4
5 6 4
2 1
7 9 8 1
8 4 1
9 6 5
2 9 6 7
2 8 9 4 3
1 3
3 4 1
Hard #5
8 6 3
3 9
8 9
2 5 7
3 8 4 1 7 2
7 3 5
6 2 5 9
8 7
9 2 3 5
Hard #6
1 3 7 5 4
3 7 5 9 8
9 8 1
2 4
8 6 9
5 6 7
2
9 8
4 8 1 2 3
Hard #7
4 9 8
1 7
4 5 2
6 4 1
7 2 4
3 2 1 6
1 3 6
1 7 4 5
8 9 7 4
Hard #8
7 5 4 8
8 6 7 2 3
3 2
3 1 5 7 4
4
2 9 4 3
4 3 5
9 1
3 4 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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