Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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