Printable Hard Sudoku

Set 1j0zdiq. 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 8 5 9
7 8
1 4 2 3 6
3 9 4 1
1
7 1 5 9 2
5 6 1
8 3 4 2
5
Hard #2
5 3 7 6
7 9 1
8
3 6 9 1 2 7
9 2 8 6
4 7
5 8 7 2
5 1
3 7 9
Hard #3
2 1 7 8
9
8 4 6
3 8 6 1
6 7 5
5 4 8 2
8 9 5 1 7
2 3
8 1 9
Hard #4
8 2 6
2 5 4
3 6 4 8
4 1 2 3
8 6 7
5
1 7
6 3 2 7
7 6 1 2 9
Hard #5
9 5
3 1 5 9 7
1 8
6 2 8
8 9 1 6
2 7 4 1
3 8
9 4 6
1 3 9 8
Hard #6
3 8
1 7 8
5 9 1 4
2 7 1 8 6
3 6
9 5 7
2 8 9 5 3
9 3 2
3 8
Hard #7
9 7
4 2 5
9 8 1 7 4
7 2 4
3 1 4
8 6 5
5 4 6
6 3
9 2 3 6 7
Hard #8
6 1 5
1 9 3 6
5 4 1 7
5 3 6
1 8 9 5
4 2
3 2 9 8 6
1 9
4 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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