Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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