Printable Hard Sudoku

Set bfkyd3. 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
7 4 3
5 1 6 2
1 8
9 2 8 3 4 7
7 4 5
8 1
1 8
1 4 6 9
9 2 8
Hard #2
1 7 6
8 2 4
2 1 9
1 5 8 3
8 6 1 5
3 5
8 4 3 2
2 9 5 4 3
9
Hard #3
7 5 9 4
3 2 7 8
6 4 9
6 3 8
5 7 9
8 2 5 1
5 4 8 9 2
2 1 7
Hard #4
1 7
9 4 8 2
8 9 5 1
2 7 1
3 4 8 9
9 3 5 8 2
4 6 3
1 2
9 8
Hard #5
8 9 4 3 2
7 8 3
2
1 7
5 6 4
8 1 3 5 6
6 7 4 3
2 3 8 6
4 9
Hard #6
1 9 6
9 5 3
8 7
8 4 5
6 3 7 9
5 6
9 6 1 7 3
2 9 1 6
3 8 2
Hard #7
3 5 4 9
2 6 9 3 5
5 4 8 2
4 5 1
3 7 4
5 2
5 9 7
1 7
6 3 1
Hard #8
7 6 8 3
4 7
5 9 1 4
8 6 1
6 5
9 1 5
2 1 6
3 4 7 9
9 8 3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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