Printable Hard Sudoku

Set dktqr5. 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
4 3 9 1 6
2 4 5 9
6 1
3 4
5 9 3 8
1 4 7
9 2
3 2 7 4 5 1
Hard #2
4 2
5 7
3 8 6 5
6 9 7 4
4 2
1 2 7 3 6
4 8 5 9
4 5 6 3
5 6
Hard #3
5 3 2 8 6 4
3 1 5
6 5 7 1
4 1 3 5 8
9 4
8 4 6
9
1 8
2 5 3
Hard #4
2 8 3
6 1 5 4
4 1 6
7 9 3
3 4 2 7 8
7 1 4
3 8 4 5
7 1 9 2
Hard #5
2 1
2 9 5 3
8 6 1 7 4 5 9
4 7 8 1 2
8 1 7
4 9 6
2
9 6 8 5
Hard #6
8 2
9 6 7
8 5 7 4
6 5 8
7 8 4 5
5 8 2
5 7 9 3
1 3 7
6 8 4
Hard #7
8 4 6
9 4 5
7 1 6 9 3 8
2 4 1
2
7 3 8 4
9 2
5 1 6 9
1 2 4
Hard #8
9 5 3 2 7
1 6 5
6 2 1
3 5 8 2
9 7 5 3
2 4 6 7
3
9 4 3
7 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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