Printable Hard Sudoku

Set 1tky1wl. 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
6 2 8 9
3 2 9 7 5
4 1 2
8 5 1 6
4 7
1 4 3 5
7 1 5 2
5 8
7
Hard #2
2 8
3 1 7 5 6
8 3 6 7
8 1
7 6 9 5 2
9 1 2 7
1 3 6 5
9 4 2
Hard #3
9 8 6 3 7
7 2
2 8 1 6
7 3 5 1
3 9 2 8 4
5 9 7
8
9 3 1
9 2
Hard #4
7 3 6
2 8 3 5 1
4 7
2 4 5 8
1 9
1 6 5 7
4 7 2 5
5 3
7 9 5
Hard #5
6 2 8
2 1 7
7 1
4 1 5
1 5 7
9 6 8 1 7
8 9 2
5 2 8 6
1 3 5
Hard #6
4 3 1
6 5
1 9 7 6
8 7 9 5
3 1 4 8
7 6
3 7
3 4 2
4 2 6 1 8
Hard #7
5 8 6 7
9 1 2 5 4
7 9 1 5
6 1 2 7
9 2
6 4 9 8
3 8 7
2 4 1
Hard #8
2 4 9
6 3
4 5 9
5 1 7
6 8
1 5 3 6
6 8 9
9 2 4 7 1 6
5 1 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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