Printable Hard Sudoku

Set 19fsjt9. 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 4 7
7 4 9 6 2
6 7 2 3 1
8 3
6 9 5 1
5 9
3 2
8 7
6 1 4 5
Hard #2
7 1 6 4
6 7
4 9 1 3
3 4
1 6 7
5 1 9 2
3 1
3 1 2 5
9 5 8 4
Hard #3
7 3 4
8 1 6
2 9 5 8
2 7 9
1 8 3
9 3 5 4 1 6
1 5 8
9 5
2 1
Hard #4
3 9 2 4
8 1 9
6 2
1 6 9
9 8 3 4
2 8 7
8 9 6 4 5
5 6
3 1 7
Hard #5
2 7 8 4
9 5 6
3 2
7 9 1 2
5 1
2 7 8
8 3 9 6 2
4 5
4 6 3 1
Hard #6
4 2 9 3
9 7 8
3 4 9
7 2
4 2 3 6
5 1 4
8 3 5 7
2 3 5
3 1 6
Hard #7
6 2 5
7 2 4
2 1 8
4 7 9 3
3 2 8 5 9
1 2
4 8
8 4 1
3 6 4 7
Hard #8
6 1 4 5 7
5 7 8
4 1
8 9
7 6 5
9 2
3 6 1 2
1 9 6
5 4 8 3 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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