Printable Hard Sudoku

Set e5fvk2. 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 9 1
8 6 5
9 2 8
2 6
7 3 5
6 5 3
7 3 1 4 9
4 7 1
2 6 7
Hard #2
5 4
6 9 8
8 2 4 1
4 1 9 6 3
3 2
6 3 5 1
5 7 2
8 7 1 4
8 2
Hard #3
9 8 7 4
1 8 9
6 9
6 5
2 4 5 9
9 2 1 8
9 7
1 4 5
2 7 8 5 1
Hard #4
8 2 5 9 6
1 7
9 5 8
2 1 4 3
3 4 5 1
6 9 7 4
5 8
6 9 7
7 6
Hard #5
1 7 9
6 3 1
9 5 7
4 1 5
2 7 5
8 6 2 3
1 4 9 7 2
8 6 4
5 8
Hard #6
7 1 9 2
1 8 5
4
8 1 7 6
5 1 3 6 7
8 1 9
2 7 9 6 8
9 7 5 4
Hard #7
8 4 1 3
1 6 4 5
3 9 4 1
9 2 4
6 7 8
9
4 3
9 2 1 7
4 7 9 1
Hard #8
6 9 1 4
1 9 2 5 8
5 3
4 3 1
1 6 2
9 4
8 4 6 5 2
5 3 9 6
4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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