Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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