Printable Hard Sudoku

Set 1dqg3xt. 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
9 2 6 5 7 3
1
2 3 8
2 6 7 1
9 5 4 3
6 4
3 8 9 6
6 8 9
2 6
Hard #2
9 7 2 8
5 8 3 6
5
3 7 4 2 8
7 4
1 4 8 5 6
6 3 9
8 1 6
5 9
Hard #3
3 1 9 5
5 9 4
8 6 3 4 2
8 3 9
4 9 5 7
9 4
9 4 5 1
6 7
1 8
Hard #4
8 2 6 7
3 4 5
6 4 9
3 6 9
9 2 8
7 5 4 9
3 6
1 5 8
9 1 8 2
Hard #5
9 8 3 4
3 4 6
7 2
2 6 7
3 4 5 6
2 4 8
1 2 6 8
9
4 5 8 7 3
Hard #6
6 8 4 9 2
3 2 5 8
8 5
7 2 1
2 3 5 6
1 7
9 4 7
6 3 4
2 5 7
Hard #7
5
5 4 1 7 2 9
8 7
1 9 3
8 3 4 9
2 5 1
3 8 2 5
4 8 3 7
2 1
Hard #8
6 2 9
3 1 8 4
7 6 9 8
2 6 1
8 9 2
7 8 5
5 4 7
2 4
3 9 7 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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