Printable Hard Sudoku

Set 1dk40vr. 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
4 3 7 1
1 2
2 4 3
7 4 5 6
8 2 9 5
4 3 9
6 9 2 8 7
8
7 6 3
Hard #2
8 4 9 6
5 9 4
8 2 6
9 3
3 1 8 2 5
2 7 9
1 3 6 9
5 3
2 7 3
Hard #3
2 6 8
6 9
9 5 7 4
5 9 4 3
3 9
9 7 8 2
2 4 1
8 9 2 4
7 2 5
Hard #4
8 9 3 2
4 1
2 6
3 5 6
2 7 8
1 8 2 5
5 8 4 7
7 4 8
4 6 5 9
Hard #5
9 1 7
5 7 8 2 6
3 1 5
3 6
3 9 4
5 8 2
8 4 1
6 8 5 2 3
9 4
Hard #6
5 9 8 2
3
2 8 1 7
1 7 5 8
2 5
5 3 4 9
3 1
8 1 3
9 6 3 7 4
Hard #7
7 9
4 8 9 7 3
3 1 9 5
1 9
1 6 8 4
6 2 5
3 2
9 5 8 4
6 3 8
Hard #8
8
8 7 5 6
1 3 9
9 7
3 5 8 4 6 1
1 6 2
1 9 2
2 6 5
9 7 8 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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