Printable Hard Sudoku

Set 1t3bjq9. 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
3 4 8 9
3 4 1
8 1
3
2 5 1 6
9 7 1 8
1 4 5 9 3 2
6 3 2 8
7
Hard #2
8 5 7 9 3
2 8
9 3 6 2 7
1 3 8
7 1 8 4
5 4 6
7 6 5
6 5 8
2
Hard #3
6 8 9 2
3 1 2 8 7
5 7 1 6
8 3 2
5 4 1 3
4 7
1 5 4 2 7
2
9
Hard #4
3 9
6 4 8
4 7 1 2
7 2 8 4 5
5 6 4 9
8 6
4 3 1 5
6 1 5 7 2
Hard #5
6 9 8
2 5 3 6
2 1 4
1 8 3
2 5 6 8
7 8 5
3 9 6 7
1 9 3
7 5
Hard #6
3 8
4 3 9 2
2 5 4 6 3
7 8 5 1
4 8 3 9
9 3 5 2
6 5
7 8
6 2
Hard #7
2 6 9
5 6 3
4 9 5 6 2
6 8 3
5 7 1
4 3 2 9
4 1 2
9 7
2 9 8
Hard #8
8 2
1 3 4
5 9 6
6 3 4
8 3 2 9 5
9 4 2
9
1 6 8 5
3 5 7 9 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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