Printable Hard Sudoku

Set j1mzdk. 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 3 1
5 2 7
6 5 9 4
9 1 6
3 8 2
6 3
2 7 8 1 4 6 9
5
4 7 8
Hard #2
3 1 6 5
7
6 8 7 9
5 9 1 8 2
8 9 5 6
1 4
5 2 4 1
2 6 9
3 8
Hard #3
9 5 6 3
5 1 2 9
7 4
6 8 7 5
6 1 7
3
9 1 4 7 2
4 8 3
2 7 9
Hard #4
1 3 9 2
2 5 3
6 3 1
9 8 3 7
6 3
8 6 9
3 7 1 6
6 1 4
8 2 9
Hard #5
4 7
5 8 3
3 8 1
3
2 7 1 5 3 8
4 1 6 5
2
9 3 6 7 5
4 2 5 6
Hard #6
5 9 8
2 1
1 8 9 4 3
3 5
2 8 4 1 6
1 9 8
4 7 2 9
1 9 7
3 4
Hard #7
4 2 3
1 2 4
2 8 3 7 1
7 1 6 5
3 6 7 5 9
6 8 1 7 4
5 4
9 1
Hard #8
6 5
4 9 2 3 7 1
8 5 1 2
7 8 1 3
3 4 6
2
1 2 3 4 9
4
3 8 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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