Printable Hard Sudoku

Set n74ggc. 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
4 9 3 8
6 7 9 8 2
8 7 9
3 8 4
1 7 2 4 3
7
9 3 1
2
8 4 5 3
Hard #2
6 5 4 2
1 2 7 8
4
3 5 4 1
1 9 3
4 7 6
9 5 2
7 6
2 7 6 4 3
Hard #3
8 1
5 4 6
1 5 8 4
1 3
8 9 2 3
9 2 6
3 1 8 5
4 1 7
8 9 2 6
Hard #4
4 7
4 1 3
9 3 8 6
7 3 4 9 8
3 1
2 9 6 7
6 1
4 6 9
9 7 2 6
Hard #5
5 2 6
8 4 2 1
3 4
1 9 4 5
7 2 1 3
3 6 8
9 8 5
2 3
1 9 2 4
Hard #6
9 3
7 8 6 1
6 5 3 9
1 3 5 7 8
2 4 9
2
7 5 3 8
2 7 9
5 8 1
Hard #7
3 7 1 2 6
8 4 7
1
6 3 7 5
5 1 4 9
8 3
2 5 1 4
8 9 2
5 4 3
Hard #8
4 5
9 5 6 3
8 2 3
1 2 9 7
6 2 3
9 7 8
8 5 3 9
7 6
3 6 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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