Printable Hard Sudoku

Set 1ut5hdy. 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 2 7
9 2
6 5 8 7 1 9
2 9
4 5 6 8
7 6 1
5 2 7
3 2 4
3 5
Hard #2
9 4
4 1 2 6 5
6 3 1 8
3
6 3 2 7 8 4
6 9
5
2 6 9 5
8 7 4 5
Hard #3
5 6 4 7 1
1 3
9 4
9 6 8 7 2
7 1 6
4 8
1 6 5
6 3 8 5 7
7 9
Hard #4
7 8
6 8 3
4 5 2 7
8 6
9 6 8 1 7
3 7 8
5 2
8 1 3 4 6
4 9 6
Hard #5
9 8 2
1 4 6 3 5
8 3 2 6
1 9
3 5 1
4 6 1
7 3 1
7 4 6 9
1 5
Hard #6
9 1 5 7
5 2 9 4
7 8
3 2
2 7 5 6 1
3 1 9 7
8
6 8 4 2
3 6 4
Hard #7
6 4 8 9
8 3 6 1
1 7
9 2 3 5 8 7
9
5 7 1 9
8 2 4 3
4 9 6
9
Hard #8
7 4 2
3 9 5 1
7 8 1
1 2 5 9
4 8 7
9 4
2 7 5 8
7 3 1
1 4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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