Printable Hard Sudoku

Set igqcn4. 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 3 8 7 9
7 2 9 1
4 3 8
8 1 4
2 1 4 8
6 7
9 1
1 6 2 3
7 6
Hard #2
4 5 3 9 8
1 5
2 8
5 7 8 6
4 2 7
3 9
4 6 7 3
8 9 4
7 1 9 4
Hard #3
2 7 9 4
5 3 8 9
4 5 2 7
6 4 1 7 5
3
8 1 9 7 3 2
6 5
1 6 8
Hard #4
2 4 9
5 3 1 8 2
8 2 7 1
4 6 5
8 7 6
5 7
9 6 2 4
7 4 5
9 3
Hard #5
2
9 4 8
7 8 6
9 5 8 4 3 7
9 1 2
4 7 5
5 6 7 4
6 8 4 3
4 5
Hard #6
7 8 2 3 6
2 9 8
6 4 7 9
2 6 3
7 5 9
3 9 2 6
4 3 6 7
1 8
2
Hard #7
8
2 1 9
9 7 6 1 5
7 4 6
9 1 5 2
7 9 8
1 9 4
3 5 8 9
8 3 6
Hard #8
1 2 4 3
5 4 9 1 2
2 3
7 5 9
7 1
8 1 5
4 6 2 9
9 6 1
1 7 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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