Printable Hard Sudoku

Set 19dwrzj. 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
7 8 9 1
1 9 6
3 8 4 2 5 6
6 9 1 5
3
9 1 8
2 8 5 4
5 2
Hard #2
3 5 7
3 2 9 6 8
7 9 4
4 1
3 9 2 6 1
8 5 3
9 1 7 5
6
8 5 3
Hard #3
3 4 7
7 2 9 1
4 1
1 9 4 6
7 4 9 5 2
6 7
7 8
1 3 9
4 8 6 3
Hard #4
3 5 6
4 2 5
2 8 4
8 4 9 2 5
6 9 1
2 4 3 6
3
7 3 8 6 2
7 4
Hard #5
8 4 9 6 5 1
6 3 9
3 6
4
2 4 1 7
8 5 2 7
7 8
2 9 7 1 3
5 1
Hard #6
9 1 5 7
8 4 1
5 4
7 5
6 1 3 5 2 4
4 2 8 1
9 2 8
2 9
6 7 4
Hard #7
7 9 5 6 4
3 8 1
1 4 2 7
3
6 9
8 5 1
6 9
1 2 6 8 7
7 4 3 5
Hard #8
2 1 5 7
4 6
4 9 3 1
1 4
3 1 7
4 6 1 8 3 2
6 5 2 9
2 9 8 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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