Printable Hard Sudoku

Set w17fr. 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 1 4
1 7 3
2 5 9 3
3 8 9 1
2 6 7 4
4 6
7 4 1 2 8
2 7 4 5
Hard #2
7 8
8 4 7 2
1 4 3 8 6
5 9 7
6 8 4 9
3 7 5
5 1 6 3
4 8
3 6
Hard #3
9 2 4 5 8
5 1
7 8 6 4
6 9
9 2 6 3
5 1 2
7 3
6 1 5 2 4
8 9
Hard #4
7 9 3 8
2 7
3 1 2
5 6 9 7
9 4 1
4 5 7 3 8
2 3
4 9 7 3 1
7
Hard #5
6 2
2 7 9
3 8 1 4
4 5 7
7 8 3
5 3 7
6 3 1 9 4
1 4 5
9 7 3
Hard #6
2 4 8
3 9 7
5 9 6 3
2 8 3
3 1 9 2
7 4 9
4 3 6 1
6 9
9 5 3
Hard #7
1 7
7 3 6
8 2 7
4 7 6 8 2
6 2 1 4
4 6
2 8 5 9
9
7 6 8 3 2
Hard #8
2 8 5 1
4 9 5
6 9 4
2
8 5 4 7
9 2 3 7
4 6 9 3
7 3 6
8 4 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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