Printable Hard Sudoku

Set jf2lww. 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
3 6 4 5 9
2 1
7 5 3
1 6
3 8
8 3 2 5
4 5 9 7
6 9 2 1 8
4 6
Hard #2
2 8 9
6 3 2 5
3 1 4
6 5 4 2
8 4 1 6
3 7 6 1
8
6 8 9
8 7 3
Hard #3
9 3
2 8 1
1 7 5
6 5 7 4 2
7 6
2 7 5
5 9 7
3 4 6
6 3 7 2 1
Hard #4
9 4 2 7
4 6 2 9 3
8 5
7 8
6 1 3
2 5 1 3
1
5 9 8
6 4 2 5 7
Hard #5
8 1 7 9
5 1 9 4
7 5 6
4 6 5
6 1
3 7 6 2
3 2
2 5 1
9 5 4 8
Hard #6
9 2
2
1 2 3 6 7
9 2 6 5
6 1 7 5 9
2 8 3
3 4 5 8 2
1
2 8 3
Hard #7
4 9 1 5
2 3 6
4 1 3
7 6 3 9 2
6 5 8 7
9 8
1 7 6 4
6
8 2 3
Hard #8
2 4 9
3 7
5 2 8
7 1 8 2 6
9 4
8 6 7
3
8 7 3 5 6
5 3 1 4 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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