Printable Hard Sudoku

Set y8vjj. 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
8 2 7 4 3 1
2
4 1 7 6
9 5 7 8
2 4 5
1 7
3 9
7 3 2 5
4 9 6
Hard #2
4 6 2 3 1
2 3 7
3 6
4 6 1
9 1 5 6
8 6 9
3 5 1 4
2
9 5 3 6
Hard #3
9 3 5
9 5 4
3 8 6
8 7 2 5
7 9 1 3
8 7
5 3 6
4 5
6 9 7 2 4
Hard #4
3 5
4
9 7 5 2
6
4 1 8 7
6 5 7 3 4
1 4 9 7 3
2 4 9 1
6 4 2
Hard #5
1 6 7 4
7 9 8
5 6 7
9 5
7 3 1 8 9
8 3 5 1
7 5
9 8 2 4
8 2
Hard #6
7 6 5 2 4
4 1 5
9 7 8 1
3
9 5 7
3 8 5 9
6 5 3 2 1 4
1 6 3
Hard #7
9 5 8
3 6 5
8 1 9 7
3 4
5 7 6 1 2 3
1 2 7 6
9 8 2 1
9 4
8
Hard #8
2 3 7
6 9 2 8 3
9 3 8 7 4
1 5 4 8
3 7 4 1
9
6 8 1
1 8 5
6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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