Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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