Printable Hard Sudoku

Set 1tcfiv3. 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
9 6 8
5
4 1 2
5 7
2 8 3 1
9 7 6
8 3 5 6
4 8 9
6 7 5 9 4 2
Hard #2
9 4 6 5
6 8 7 3
5 9
4 7
4 5 9 8
9 3 6 1
8 5 9
5 2 9
4 1 5
Hard #3
5 7 2
3 2 6
2 5 9
7 3
2 6 1 3
2 4 7 8
7 8
5 6 8 1
7 5 6 1
Hard #4
6 8 7 1
1 9
9 2 7
2 9 3 5
5 4
6 4 2 8 9
6 9 8 3
2 5
5 3 7
Hard #5
2 3 4
8 9 5
1 6 2
9 6 7 5
7 1 2 3
8 3 6
4 3 1
1 5 6 4 9
2
Hard #6
2 8 5 3
8 9 5 1
4 7
6 4 8 2 5
3 8
3 9 6 1
6 3
8 1
4 9 2 8
Hard #7
3 7 1
4 2
8 6 9 5
5 7 1 3
2 3
4 9 8 7 2
3 1 2 5 4
1 6
4 6
Hard #8
8 5 3
2
4 1 8 6
8 1
7 6 1 2 9
8 1 7
1 3 5
8 1 4
9 3 7 5 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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