Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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