Printable Hard Sudoku

Set 1t7xq5d. 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
7 9
8 3
9 3 2 4 6
9 7 8 6
1 2 9 6 5
3 4 2 9
4 7 3
2 5
1 6
Hard #2
4 9
1 3 2 9 6
7 9 4 5
2 1
1 7
7 9 5 3
3 2 4
2 8 1 5
4 8 9
Hard #3
4 7 6
8
4 1 2
3 8 5
3 9 6 7 2
8 9 2 6
3 9
2 8 3 6
2 7 8 5
Hard #4
1 7
2 7 5
1 6 8 3
2 8
9 8 6
6 4 2 7
4 6 7
8 5
8 9 7 5 4 1
Hard #5
5 2 9
3 6 2
5 3
6 3 9
9 7 3 8 5 4
5 9 4 2
6 3 4 8
6
8 9 7
Hard #6
8 9 4
1 9 6 3
5 7 2 8
2 4 1 3 7
3 2
3 4 8 5
6
9 8 2 7 3
9
Hard #7
8 5 7 9 6 2
1 5 4 8
3
3 9 8 1
3 2
2 7
5 7 8
4 8 9 6
5 4 7
Hard #8
1 3 9
6 8
1 4 2 7
4 8 1
5 2 3
6 9 3 5
8 5 2 1 7
6
5 7 8 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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