Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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