Printable Hard Sudoku

Set 1e0kl3j. 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
4 7
3 4 2
7 9
1 8 4 3 5 7
5 1 4 8
9 4 5
2 3 6 1
7 9 2 4
3
Hard #2
8 2 5
9 4 6 3 8
6 9 3 8
2
7 3 5 1
5 9 8
4 1
1 9 4
6 5 2 8
Hard #3
5 7 6
3 7 1 8
1 6 2 7 4 3
2
7 5 3 4 8
4 1
8 5 2
3 6 1
9 2
Hard #4
8 2
4 5 3
6 3 7 8 5
3 1 7
6 9 2
9 8
2 7 9
4 7 5 6 8
5 1 3
Hard #5
2 8 3
4 9
2 9 8 4
9 5 4 1
5 4 7
1 6 9
7 6 3 8
3 2 7
2 3 6
Hard #6
3 8 1
6 5 1 4
7 2 4 3
9 5
8 6 1 9
9 2 3
4 2 8
9 3 5 8 6
7
Hard #7
4 3 7
9 8 6
5 1 7 9 6
3 4 7 5
9 5 8 3
3 8 1
1 3
4 2
5 3 9
Hard #8
1 4 6 7
8 5 9
4 1 3
8 5 2 9
1 9 2
1 7 5 8
6 9
8 4
1 8 7 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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