Printable Hard Sudoku

Set ytv3jj. 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
7 2 3 1 8
6 8 5 1 4
1 4 7 6
5
3 9 7
1 8
8
2 8 3 6 4
7 9 3
Hard #2
1 9 7 5 3
7 4 2
9 4
9 1 2 6
8 5 9 6
6 3 5 4
7 3
1 3 6
4 8
Hard #3
2 4 5 3 6
5 6 9
5 7 2
8 2 4 7 5
2 3 9
1 2 9 8
8 3 7
3 1 2
Hard #4
6 7 9 3 1
4 2 5
1 6 3 2
1 6
9 8 7
4 6
2 5 3 9
8 4
7 6 4 3
Hard #5
4 2
6 4 2 8 9
9 3 5 6
5 7 2 3
2 5 6 8
3 6 1 9
1
8 7 3 6 4
Hard #6
9 2 8
1 4 7
6 1 4
5 4 9 1
8 6 5 7
2 6 5 8
5 3
7 8
2 9 1 5
Hard #7
2 6 5 7
7 3 6 4
2 8 6
3 1 7 4
9 4 5 1 2
4 7 5
8 5
4 9
8 7
Hard #8
9 2 4
3 5 7 8
8 5
8 2 5
5 1 6 7 9
6 7
9 7 1 8
1 7 6
8 3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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