Printable Hard Sudoku

Set jp2r4g. 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 9 8 5
7 1
8 4 7 9
2 8
7 3 2
5 6 2
3 7 5 1 2
2 3 9
9 4 8
Hard #2
5 4 1 8 6
5 8 2
3 7
2 1 8 6
9 7 3
9
2 3 1 6
4 6 7
3 5 4 2
Hard #3
1 8 3 6
4 2 5 8
8 9
9 4
7 9 4
8 4 6 9 5
5 7 8
5 1 7
2 8 1
Hard #4
3 8 6
5 7 4
1 4
1 8 3 2 6
8 6 4 7
5
6 9 5
9 3 5 7 1
4 6 3
Hard #5
9 3 6 5 4
5 7 2
2 3
8 6 3 1
4 9 8
1 5 6
5 3 2 9
1 7
3 5 8
Hard #6
1 7
1 4 5
8 5 1
9 6
8 7 9
8 2 3 9 4
7 1 4
1 3 2 5
8 6 3 2
Hard #7
1 5 9 7
3 2
7 6 3 1
4 1
6 2 5
3 6 8
3 1 9
4 9 1 3 2 6
5 4
Hard #8
8 2 7
9 1 4 6
1 7 4 9 5
8 1 6 3
6 5 7 8 4
9 2 5 8
4 1
1 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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