Printable Hard Sudoku

Set 1g7jq0r. 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
4 3 6
8 5 7 4
6 8
6 9 4
5 4 9
3 8 6
8 7 4 1
7 2 4
6 5 1 8
Hard #2
9
4 7 3 6
2 8 4 1
6 7 8
8 4 7 1
9 1 4
1 5 3 9
9 8 4
6 2 7
Hard #3
1 4 3
9
8 6 7 2
2 3 1 6 5
3 7
5 4 7 1 3
2 3
9 7 4
4 5 2 1
Hard #4
7
2 5 4 3
6 8 9 5 2
5 9 8
9 7 1
1 6 3 4
4 6
7 8 2 9
5 9 1
Hard #5
5 9 4
1 9 5 3 7
5 3 1
7 3 2 5 4
6 8
3 2 5 1 7 4
7 8
8 6 5
Hard #6
7 2 3 1 8
1 8 7
3 6
8 4
5 3 8
9 7 8 5 6
6 5 2 3
1 8 4
2 8
Hard #7
2
1 7 8 5 4
9 4 5 1
9 1 6
1 4 5 7 8 3
2
9
4 5 6 7
7 8 4 6
Hard #8
4 7 1
7 1 3 8 2
2 9 5
2 5
5 9 1 8 2 6
6 1 5
8 6 3
2 7
7 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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