Printable Hard Sudoku

Set 1vh9pe8. 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
6 5 1
3 9 4 1
2
6 4 7
6 2 1
2 1 9 3 5
5 6 9 8 1
4 7
9 7 2
Hard #2
5 1 3
9 3 6 2
4 2
1 3 9 6
7 8 4
9 5 2 7
3 4 9
7 8 9 1
3 2
Hard #3
1 8 6
1 7 3
9 7 2 1 5
2 6 5 9
4 5
7
5 6
6 4 8 3 1
8 2 5 7
Hard #4
4 6 3 8 1
5 9 7 3
8 2 7
3 1 8
5 8 9 6
4 9
6 5 4 3
8 7 4 9
Hard #5
4 8 1
3 6 4 5
5 2 4 3
4 6 1
2 3 6
3 8
9 7
7 8 4 2 3
7 2 4
Hard #6
4 9 2 6 3
1 7
4 1
9 8
7 5 2 4 3
6 3 4 9 1
1
2 8 5 6
5 3 6
Hard #7
7 3 4 5
8 9 7 2 4 1
2 8 1 6
5 9 2
6 8 7 3
8 9
5 7 6 3 8
6
Hard #8
5 6
9 3 1
1 7 6
9 3
6 9 5 4 8 2
8 6 9 5
6 4 2
4 3 9
8 7 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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