Printable Hard Sudoku

Set yt6wta. 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
2 4 6 3
8 4 7
7 3 1
6 1 8
8 5 9
9 2 8 6
3 9 2
1 5 3 9
7 8
Hard #2
4 7 6 2 9
6
9 4 6
6 2 1 8
5 8 7
7 9 1
8 4 9 1
3 4
7 1 8 2
Hard #3
6 1 5
8 6 4 3
4 7
2 3 4 7
6 5
7 4 2 9
1 5 9 7 3
4 3 2
6 8
Hard #4
3 7
5 9 3
8 2 6 7
2 5 1 3 9
8 2 1
4 1 2 5
9 3 2 1
5 3
2 6
Hard #5
4 1 5
6 9 7 1 8
6 9 2
1 7 5
8 2 9
7 6 3
7 1 8
3 5 9
2 9 1
Hard #6
4
4 2 9 7 5
2 7
6 2 3 9 8
3 1 6
9
5 8 3
6 7 3 5 9
5 2 7 6
Hard #7
6 5
9 7 4
2 9 3
4 7 2 6
8 3 7
2 3 5
9 4 1 2
1 5 6 7 3
2 1
Hard #8
7 2 6 9
3 1 7
4 8
7 4 9 3
4 3 5 8
6 2 7
1 2 9
8 5 6 3
3 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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