Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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