Printable Hard Sudoku

Set 6q8ujd. 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 7
9 5
3 6 9 7 1
5
1 7 8 4 2
4 7 8
1
4 5 2 3 8 7
1 4 8 9
Hard #2
8 5 9
7 8
6 2 8
6 2 8 9
3 2 1 4
5 4 9 6
9 5 8 4 7
4 3 2 5
Hard #3
4 5 1 3
7 4 6 5
3 1 7
1 8 4 2
8 2 3 5
7
4 5 1 3
3 8
9 8 6
Hard #4
1 9 2 4
8 7
9 3 8 2
4
6 3 1 7
3 5 7
5 6 2 9
9 1
1 7 9 3 5
Hard #5
6 8 9 5
8 4 3 9
3 8 7
5 3 1
4 2 8 5 1
3 2
8 4 7 3
6 5 2 8
Hard #6
1 7
1 4 6 9
9 6
4 7
1 5 8 6 2
3 9 6 7 1
3 6 5 2 1
4 7
2 9
Hard #7
5 4 1
2 6
7 3 8 9
3 2 7
9 1 4 3
7
1 6 7 9 5
8 2
1 5 9 4 3
Hard #8
2 4 8
2 7
5 7 8 3
2 1 6 5
6 7 1
9 4 2
8 2
4 3 7 8
3 8 4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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