Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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