Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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