Printable Hard Sudoku

Set v531nw. 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
1
7 8 4
7 2
1 4 5 6 8 9
3 6 8 5
7 3
2 7 1 3 8
1 7 4 6 2
9
Hard #2
6 9
9 3 4 7 2
4 6 3
2 4 1 7
4 5 3
6 5 9 2 1
8 4
1 3 5
7 2
Hard #3
2 7 1 9
3 4 5
5 4 9 1
1 6 5 9 7
5
3 8 1
4 1 3 7
7 9 8
2 5
Hard #4
2 3
1 5 2 7
6 5 9 3
8 1 3 9
7 3 2 6 1
6 7 5
5 8 9
4 3
1 6
Hard #5
9 8 3 7 2
3 6 1 5 8
2 1 5 3
1 3 7
5 9
1 8 2 7 3
6 2 4
4 1
Hard #6
6 5 9
2 6
8 5 6
7 4 2
4 3 2 1 8
6 4 7 3
1 4
3 5 6 9
7 6 2
Hard #7
2 8 4 5
2 7 6
6 4 7 1
6 4 5
8 9 2 6
8
9 1
3 2
4 6 8 9 3 1
Hard #8
2 8 7 3
1 2 9
3 9 8 7
6 5 4 7 2
5 8 3
8 5
2 5 3 7
8 1 4 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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