Printable Hard Sudoku

Set ynqlv9. 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 2 5 9
4 8 3
7 4 9 1
2 9 3
4 6 7 8
6 8
7
4 7 2 5
9 1 6 2
Hard #2
9 1 5 6
5 7 2
4 1 6 2
1 8
9 7 4 3 5 8
1 4
1 9 3
6 7 8
5 2
Hard #3
3 1
4 8
5 8 1 4
7 6 4
8 5 2
6 4 5
2 1 4 6
6 4 7 3
9 8 5 2
Hard #4
7 1 8
2 3 6 9 1
7 9 2 6
7 8 9 5
6 9
3 9 7
2
1 7 5
9 7 5 8
Hard #5
3
5 4 7
1 2 5 3
6 3 1 8 7
9 8 6
5 7 9 2 3
8 9 2 5
9
3 1 2
Hard #6
2 7 3
9 1 7
5 3 1
1 6 4
2 7 5 9
1 5 8 3
3 7 4 2 6
6 9 4 5
Hard #7
1 4 5 3
8 1 7 9
5 9 4
6
8 9 1 2 5
5 3 9
2 5
3 4 7
1 6 3 8
Hard #8
7 9 8 1 6
1 8 3
4 8
3 5 7 8
9 4
2 3 8 1
1 6 3 7
9 2
8 3 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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