Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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