Printable Hard Sudoku

Set k22tn5. 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
5 4 7 3
7 9 8 1
2 1 4 7
5 3 8
9 7 3 4 5
1 9
6 8 1
7 1 9
8
Hard #2
8 2 6 7
4 5 8
3 6 1 9
3 1 4
9 8
1 8 3
2
1 9 4 3 2
2 5 9 4
Hard #3
5 6 8 4
9 7 4 8 6
8 7
5 1
4 3 6 7
6 9
8 1 2
1 3 9 7 2
9 3
Hard #4
3 2 4
9 5 8
8 6 7 1 9
5 4
2 9 6
8 2
7 6 3 8
1 7 6 4
2 9 6
Hard #5
8 4
7 3 1
4 2 9
5 2 6 1
1 2 4 6 3
6 1 2
3 6 8
9 8
7 2 4 3
Hard #6
7 4 5 2
4 7 9
9 3 1 5
9 7
8 9 1 6 2
1 2 4
7 3
8 6 3 4
1 7
Hard #7
2
7 2 1 3
9 5 3 1
5 7 1
4 9
1 3 6 7
8 9 2 7
9 2 6 1 5
6 4
Hard #8
1
4 7 2 3 5
9 7 5 4 2
6 4 9 5
9 4
6 3 1
2 1
8 5 9
3 8 6 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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