Printable Hard Sudoku

Set uomvq2. 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 4
8 1 4 5
9 6 1
7 3
8 6 5
3 1 2 5
2 1 4 3
7 1 4 3 9
4 8
Hard #2
1
5 2 9
6 7 9 3
1 2 7
3 5 9 1
5 9 6
7
1 4 3 7 8 6
9 4 6 5
Hard #3
5 8
9 5 1
3 8 4
3 7 8 6 9
5 9 6
7 2 5 3
9 3
7 8 4 5 6
8 4
Hard #4
3 4 7
6 2
9 1 2 5
9 7
9 4 6 8
7 2 1
9 3
4 2 7 8 9
3 4 1 8
Hard #5
8 7 3 9
2 5 3 4
7 1 2
9 2
3 5 8 6
9 6 7
7 5 1 8 2
2 4 1 9
Hard #6
3 6 2 9
1 7
9 8 3
3 6 7
6 2 9 7
7 5 6 1
8 9 5
5 7
6 7 1 4
Hard #7
5 1
3 8
1 8 2 3 5
2 1
8 7 3 9
7 4 8 9
7 6
5 1 6
1 9 7 4 5
Hard #8
4 7 8 6 1
8 1 7
5 3
2 7 8
3 7 9 8 2
4 6
4 9 7 3
5 9 8
4 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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