Printable Hard Sudoku

Set bka4qs. 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 5 9
3 9 1 7
2 5 1 3
7 2 3 6
8
3 1 7
6 4 9
4 2 7 8
1 9 3
Hard #2
4
8 9 7
3 6 2 1
3 7 2 9
8 7 4
6 1 5
3 6 7
2 6 5 3 9
7 5 6
Hard #3
4 9 5
4 2 6 8 9
9 1 5
6 7 9 5
2 1 8
1 4
1 3 2 8
6 5 9 2
4
Hard #4
4 7 8 2
1 9
4 7 1
6 3
9 5 1
8 2 5
3 4 8 6
5 6 4 7
9 1 2 3
Hard #5
8 9 6
9 7 5 3 4 1
1 8 9
7 5 3 2
9 5 4
6 9
9 7 8
6
4 3 8 7
Hard #6
3
5 9 4 2
1 7 9
7 4 5 3 6
2
4 8 5 1
6 3 7 2 8 1
1 6
4 5 7
Hard #7
2 8 9 3
9 7
1 3 8 6
4 8 3
7 5 3 1
3 4 9
5 4 9
8 1 6 4
5 7
Hard #8
7 3 6
3 4
4 8 2
6 7 1 8
1 5
2 4 7 3 5
9 7 6
7 8 3 2 6
1 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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