Printable Hard Sudoku

Set 197gnb8. 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
3 7 5
1 9 8 4
7 8 2
8 4 5 2
7 6 9 1
5 9
3 5
4 3 6
8 1 9 4
Hard #2
2 4 7
2 4 9 6
7 1
9 7 3 8
3 8 9
7 9 4 5
9 4 7 5
2 7 1
5 3
Hard #3
2 5
1 7 2 8
4 6 9
3 1
5 6 2
8 1 9 4
6 5 9 3
9 8 7 1
8 5 4
Hard #4
3 6
9 2 5 8
8 9 5 1 7
1 5 6
2 6 7 8 1
9 7 3
7 6 9
7 4
8 7
Hard #5
7 9 4 1
1 2 8 9 7
4 7
1 4 8 6 7 9
9 7
6
6 5
8 2 6 4 3
2 9
Hard #6
2 6 4 8 9
8 9 1
5 8 3
9 6 5 7 8
6 2
8 9
8 2 7 6
3 7 5
1 3
Hard #7
9 2 5 4
5 4 6 1 7
1 4
3
1 5 6
2 5 6 4
1 3 6
8 7 3
6 2 7 8
Hard #8
5 8
6 2 7 9
8 1 7
6 9
4 5 3
4 2 7 8 9
7 9 2
2 9 4 3
5 4 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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