Printable Hard Sudoku

Set 14vb4uz. 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
7 1 2 6
9 3 7 5
4 9 6
2 3
5 7 8 4 3
9
2 6 4 1
3 9 4
5 3 6
Hard #2
7
2 5 4 3
6 7 8 9 4
9 1 6
1 7 6 9
4 3 2
2 3
9 2 5 7
5 7 6
Hard #3
4 9 3 7
9 2 5 1
2 9
5 9 7
8 7 1
2 7 3 6
8 3 9 2
1 4
3 1 4
Hard #4
3 6 2
2 5 7
2 4 8
2 5 8
4 9 3 1
8 1
3 9 6 4
5 8 4 6
8 7 3
Hard #5
5 2 3
9 6 8 2 5
8 7 3 9
4 9 6
9 5 3
4 5 7
5 6 4
7 8 9 5
8
Hard #6
5 8 1 3 7
2 8 9 4
6 1
6 1 8 2
2 9 5 7
3 8
2 3 1
8 4
5 8 9
Hard #7
7 5 3
8 4
3 9 7 2 6 4
5
1 9 4
5 8
2 6 7 8
3 6 5 1
4 9 1 2
Hard #8
7 5 1 4
4 6 5 7 3
3 6 9 7 4
6 2 1 8
9 2 8 1
1
5 4 2 8
4
9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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