Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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