Printable Hard Sudoku

Set 38vpyd. 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 4 1 2
2 6 3 9
2 8 5
7 8 4 6
5 1
9 3 7 8
8 9 7
1
4 5 9 7
Hard #2
4
3 7 1 9 2
4 2 5 1 8
6 5 2 3
1 3
5 1 4
5 9 8 3
4 7
1 7 9
Hard #3
1 8 3 6
3 4
2 8 5 3
1 3 4 5 2 9
8 4
9 7 3
1 8 7 5
6
7 2 1
Hard #4
3 8 9 2
1 5
5 3 8
7 6 1 9
2 7 5 4
3 9 4
2 8 7 9
3 1 6
2 1
Hard #5
3 2 1
7 8
9 2
9 5
5 6 3
9 1 4 6 5
1 7 3 8 4
9 4 6
8 2 3 7
Hard #6
5 9
3 8 1
4 7 9 6 2
6 1
3 4
1 4 2 7
1
3 6 5 8
5 4 3 8 7 6
Hard #7
7 1 4 8
8 3 2 5 4
9
9 1 5 2
8 6
3 5 1
6 9 1 4
8
5 8 3 6 1
Hard #8
1 2 9
9 3 4 7
2 5 8 3
2 8 9 6
7 3
7 3 4
2 3 6 5
3 6 4
5 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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