Printable Hard Sudoku

Set fzt7ws. 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 5
6 5 8 4
5 3
6 4 9 2 7
4 1 8
2 9 3
2 4 3
7 5 4
6 5 2 8
Hard #2
4
7 4 5 1 9
9 2 8 7
2 8 4
9 1 3 2
3 8 9
7 9 1 3
4
4 3 6 8
Hard #3
6 8 1 3
3 5 6 9 4
3 4 1 9
8 9 5
5 9 3 6
2 6 8
1 9
4 7 5 2
Hard #4
8 6
6 5 7
1 4 2 9 3
5 6
6 3
1 2 3 9 8
3 2 9 4 8
6 5 3 7
4
Hard #5
1 8 2 6
3 5 8
6 9 7
7 9 5 3
5 8
6 5 8 2
9 1 2
7 3 4
8 4 1
Hard #6
9 3
2 4 7 1
3 4 5 6 1
1
8 2 9
9 4 5
5 7 2
7 9 6 4 5
3 8 6
Hard #7
2 6 7
1 5 4
6 9
2 1 5
8 4 6 9 1
3 9 4
3 6
2 7 5
1 4 6 3 2
Hard #8
6 1 8
3 9 7 1 2
4 5 6
7 6 3 2
4 2
5 7
5 4 1 9 8
6 5 2 1
9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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