Printable Hard Sudoku

Set dyra8l. 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
8
7 1 9 5
4 9 2 6
3 9 4 8
2 5 6 7 1
8 3
1 7 4 2 6
2 7
8 3
Hard #2
9 2
5 2
9 8 4 1
9 2
5 7 3 1
1 3 6 9
5 9 3 4
7 6 3
9 2 7 8
Hard #3
3
1 4 8 6
5 6 8
2 6 7 8 1
9 2 6
8 5 6 1 2
6 2 9
2 6 3
5 9
Hard #4
4 5 6
5 2
6 1 4
7 3 1 5
9 5 4
8 4 9
6 9 5 7
3 4 2 7 8 9
9
Hard #5
1 5 3
6 2 7 3 8
9 6 7
7 6 8 9 3 5
9 2 8
2 4
8 9 1 7 3
6
2
Hard #6
1 9 7
6 2 8
6 4
1 8 2 3 4
3 8 1
9 1 4
9
7 1 3 2 8
3 2 5 7
Hard #7
2 4 1 6
1 7 6 8 9
3
1 9 6
4 3 1
6 8 7 9
4 5 9
8 7
1 6 2 3
Hard #8
1 4 2
4 8
8 5 6
4 6 7 1 5
2 9 5 4
3 1 2 6
9 5 1 4
7 3
5 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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