Printable Hard Sudoku

Set 2ergi3. 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 9 8 2 3
1
6 5 2 9
5 8 9 6
8 1 9
4 6 8 3
2 7 5
9 2 7
3 8
Hard #2
3 8
8 9 2 4
4 2
3 5 1
4 1 7 9 2
9 8 3
1 6 5 8
3 5 1
5 6 4
Hard #3
2 6 5
4 2 7
3 1 8
5 4 6 7
8 2
1 9 5 6
7 6 4 2 9 8
9 1
5 6
Hard #4
4 9
7 3 4
1 9 3 5
6 9 3 4
7 3
1 5 8
7 3 6 1
4 6 8 2 7 3
8
Hard #5
6 3 4
8 7 2 3
4 6 7
9 7 4
2 1 6
8 5
4 5 3
2 7 5 3
7 4 9 8
Hard #6
6 9 3 7
8 7 6 4
2 7 8
4 9
3 6 9 2
3 5
3 1 2
2 6 9 5
5 7 6
Hard #7
3 5 2
2 4 8
7 5 6 9 1
3 5 6
6 8 9 2
2 5 7 8
5
3 5
5 2 7 4
Hard #8
3 4 8 7
6 3 9
5 2 4
2 5 9
7 5
8 7 9 3
6 3 2 7 9
6 4
9 8 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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