Printable Hard Sudoku

Set 146ryjj. 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 9
8 9 4
6 8 7 3
9 3 8 6
2 6 1 8
8 5 3
5 1 6 8
9 8 7 2
3
Hard #2
9 4 7 6 2
2 8 1
6 1 2 8
6 9
3 9 2
3 5 6
3 8 2 9
9 2
8 1 7
Hard #3
1 4 3
2 7
6 5 1
1 9 4
5 4 3
6 1 5 9
2 3 9 7
1 5 3 4
9 7 3
Hard #4
2 1
3 2 1 6 4
4 3
4 8 7 6
7 5 4
6 5
1 4 8 6 2
9 4
8 2 3 1
Hard #5
6 5
8 7 6
3 4 5 8
2 7 9
4 8 2 7 5
9 3 1 4
5 4 1 3
1 2
6 9
Hard #6
2
6 7 2 1
4 9
2 9 6
7 3 5 8 6
3
8 1 9 3 5 6
7 5 1 3 2
5 8
Hard #7
5 3 9
4 3 6 7
5 1
1
8 2 4 7 6
6 9 8 2
7 9 8 5 4
2 6 8
9 3
Hard #8
9 5
6 1 8
3 2 7
5 1 3
2 7 4
1 8 6
7 8 2 5 9
6 2 7
1 3 6 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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