Printable Hard Sudoku

Set 1t827xl. 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 9 5
1 8 3 6
3 5 9
2 4 5
5 6 2
4 7
9 8 1
6 4 1 8
1 2
Hard #2
9
3 5 6 7
5 1
8 2 6 4
6 7 2 1
4 8
7 6 1 5
4 3
3 1 7 4 8 9
Hard #3
1 4
3 5 9
7 9 1 8
6 5 8 3
9 3 4 7
2 1 4 6
8 2
3 5 8
6 5 4
Hard #4
5 9
8 9 1
2 9 4 6
3 7 8
5 3 6
6 2 3
6 3 7 8 2
5 9 3
8 2 4
Hard #5
5 4 8
3 6
4 2 1
6 7 2 4 5
5 1 9
5 8 4
8 3 2 6
2 4 1
3 2 9
Hard #6
6 8
7 3 9
8 7 4 9 2
7 5 9
5 2 1
7 6 2
6 9 2 1 5 7
2
8 2 3
Hard #7
3 7 9 5 8
3 2 9
1
5 3 2 9 8
8 9 7
2 6 1 3
4 5 8
5 4 8 6
6
Hard #8
2
4 8 6 5 7
1 2 3
1 2 3
3 7
8 3 4 5 6
6 1 9 3
9 1
8 6 5 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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