Printable Hard Sudoku

Set a14nr2. 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
9 1 7 4 5
5 8 7
4 1
7 6 9
5 6 3 4
4 3 1
3 1 2 6
1 6 7 5
8
Hard #2
1 5 7 9
9 3 1
3 1
8 4 5
9 7 4
9 2 1 8
8 1 3
4 3 5 1 7
3 2
Hard #3
5 1 2 3 8
7 1 9 3
8 4 9
2
2 5 9 1 8 7
8 2
4 1 5
5 9
5 3 6
Hard #4
2 3 6 7 9
2
7 1 6 9 4
8 4 1
2 6 8 7
7 5 3
4 3 5 6
2
4 8 5
Hard #5
1 7 5
6 1 3
2 4 1
5 1 2 7 9
7 9 3 8
8 6 7 5
4 9
9
6 3 1 4
Hard #6
2 3 6 4 5 7
2
4 9 3 5
8 6
9 1 4 2
7
3 9 2
4 7 1 3
1 2 8 9
Hard #7
5 3 1 7 8
8 7 6 9
7 8 6 5
6 9 4
3 5 9 1
2
3 7 4
2 1 6
8 1
Hard #8
3 9 8
9 8 2 6
5 7 4 2
4 8 7 1
5 1 6 4
7
3 4 7
9 1 5
8 4 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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