Printable Hard Sudoku

Set fatp3l. 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
4 7 5 6
4 8 7 6
3 7 2 1
7 5 6 4
1 3 9
9 5 4 8
3 8
8 7 9 3
Hard #2
4 9 5 2
2 8
5 1 4 2
6 2 5
8 7 6
7 9
9 7 4
3 2 1
8 7 1 4 2
Hard #3
7 9
1 3 7
3 4
7 6 8
5 2 3 1 4
8 1 3 5
9 7
5 8 9
3 4 1 2 6
Hard #4
4 2 8 7
6 9 1
5 9
9 4
1 7 3
2 8 9 6
3 9 8 7 5 2 6
5 6
8 2
Hard #5
8 9
1 2 6 3
8 3 4 5
4 5 1 7
9 2 1
3 9
4 5 6 7 1
3 7
2 8 6
Hard #6
9 4 3 1
4 2 1 5
9 1 8
9 7 1 3
2
2 3 1 6 9
1 6 8 9 2
7 4
9
Hard #7
1 4 5 3 8
6 5
3 4 9
3 9
9 4
4 5 3 7 8
9 5 8 7 6
8 1 4
2 3
Hard #8
7
2 1 3 7 5
4 8 6 2
8 6 4 5 2
6 7 9
3 5
8 3 6
6 9 3
5 1 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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