Printable Hard Sudoku

Set 4d79av. 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
1 8
7 9 2
8 6
5 3 6 2
7 5
6 4 2 7
8 1 6
3 5 1 9 8
6 7 4 3
Hard #2
9 1
5 4 7 3 8 9
4 5
3 9 2
2 8 7
8 3 6 9
9
6 7 4 1
2 7 5 3
Hard #3
2 6 4 5
3 9 1
7 4
1 9 5 6 7
3 9 7 2 1
2 8
5 2 4 8
6 7 1
7
Hard #4
3
8 7 5 4 2
8 9 7 6
6 2 1 7
1 6 4
3 1 2 8
3 8 2 5
1 6
3 2
Hard #5
9 3 8 4
7 1 3
1 6 7
6 5 3 4 7
8 4
1 7 8
7 3 6 5 9
3 9 4 6
Hard #6
1 7 4 8
3 1
6 8 7 9 3
5 8
7 4 1
3 1 8 6 5
9
2 4 9
1 6 5 7
Hard #7
9 3 5 7 8
8
6
3 6 5
7 1 4 6 3 2
6 7 8 5
5 9 7
6 3 4 7
4 1
Hard #8
8 1 2 7 9
9 6 7 3 2
2 8 5
7 4 3 6
2 7 6 8
4
1
1 2 7
2 8 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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