Printable Hard Sudoku

Set 1hgcar9. 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 8 2 6
7 9 4 1 3 8
8 9 5
9 5 2
8 1 3
6 8
5 2 7
1 4 8 3
5
Hard #2
8 5 4 2
8 6 7 9
5 9
7 5 3
3 4 7 1
9 2 8
1 5
2 6 8
5 1 9 6
Hard #3
8 2 4
5 8
2 1 5 9
2 3 7
2 5 1 4
5 3 4 7
8 4 7
7 5 9 4 8
1
Hard #4
5 9 4
8 6 7
9 3 8 1 6 5
1 9
3 2 5 6
8 7
3 7 9
7 8 1
1 2 3
Hard #5
6 3 5 9
3
5 2 1
1 7 5
7 8 4 5
1 9 6 4
9 1 4 7 3
2 1 5
2 7
Hard #6
2 5
1 5
1 5 8 3
5 9 3 7
8 7 4 9 2 5
5
3 2 1 6 9
7 1
1 3 4
Hard #7
8 2
3 5 7 1
4
3 2 5 4 9
1 6 4 8
7 5
8 9 6 2 7 5
5 8 4
6 9
Hard #8
8 5
6 3 2 1
4
1 6 8 3 9 7 4 5
9 7 2 1
6 9
8 6 3
3
1 7 3 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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