Printable Hard Sudoku

Set 14qitoj. 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 1
8 9 5 2
5 3 2 6
9
6 5 2 1 4
4 6 1 5
3 7 6
7 3 8
4 2 1
Hard #2
2 7
9 1 4
9 5
2
5 3 7 6 8 4
1 2 4 7
5 8
9 8 6 7 5 1
4 3 7
Hard #3
6 1
2 8 9 4
5 4 2 6
1 7 9
3 7 5
9 4 6
6 1 2 7 8
3 4 1
5 3
Hard #4
6 2 7 1
9 2 4
1 8 6
2 5 9 7
4
7 8 5 6 1
8 6 5
7 3 1
1 2 7
Hard #5
1 6
2 7 8
3 6 5 1 9
8 5 4 1
7 9 6 4 2
2
7 8
8 6
8 5 9 2 3
Hard #6
5 3
9 3 8 4
1 2 7 5 6
4 6 2 7
8 7 4
2 9 8 5
2 1
4 9
9 6 5
Hard #7
8 6 1 5
7
7 1 5 2 6
8 2 6
7 1
2 6 3 5 4
1 3
1 3 6
5 6 8 9
Hard #8
5 1 4 6 2
2 6 3
3 5 9 7
6 9 7 4
8 4 5
9 5
6 1 8
3 2 6
8 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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