Printable Hard Sudoku

Set 14nh847. 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
6 1 7
9 6
2 1 5 9 3 4
4 2 9 1
8 4 3 2 9
7
1 5 8
2 7 6 9
8
Hard #2
1 9 2 4
5 6
6 7 3
2 3 8
4 3
3 1 7 4
4 5 1
5 9 6
3 2 6 8 5
Hard #3
8 6 9
1 9 8 7 3
3 2 4
3 4 2
5 9 6 3 8 4
8 9
5 7
9 1 2
2 6
Hard #4
2 9 3
8 2 4
5 8 9 7
4 6 5 8
5 7 2
4
7 3 5 2
6 8
6 4 9 7 8
Hard #5
2 4 9
3 4 1
4 8 1 3
3 7 4
5 9 4 2
6 5 3
8 2 4 5
2 8 1
7 6
Hard #6
2 4 7
3 1 8 4 2 5
9 7 4 1
3 2
8 4 6
5 9 1 2
8 4 3
9 8
1 4
Hard #7
2 6 1
1 7 9 8
6 7 3 1
9 5 3
7 2 4
4 9 7
8 6 5 2
9 1
9 7 5
Hard #8
9 4 8
5 6 1
3 1 4
4
1 7 4 2 5 6
2 9 8 3
2 3 1 9
7 6
6 5 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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