Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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