Printable Hard Sudoku

Set ihjg1g. 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
4 7 9 1
9 6 3 4
7 6 4 9 8
3 2 9
5 8 1
7 3
9 1 6 4
5 4
8 1
Hard #2
9 5 1 8 2
3
8 4 5 9
2 9
1 4 8 9
4 2 7
6 3 1
7 3 4 2 5
3 4
Hard #3
1 7 3
2 5 9 6
6 7 4 2
4 5 8 6
3 2 1 7
5 4
3 8 9 2
8 5
6 2
Hard #4
3 7 9
7 1 5
6 3
4 6 1 2
5 4 8 6 1
7 2 3
2 7 9
1 3 4
6 3 8
Hard #5
5 3 7 8
1 5 9 6 4 3
3 1 6
8 1 2 3
9 8 2
5
4 6 3 1 9
6
8 5
Hard #6
7 1 3 8
9 6 5 1 3
5 2 6
3 2 1
1
9 7 4 5
5 2 1 9 3 7
7 9 6
Hard #7
9 6 4
7 4 9 3
2 1 8
5 1
6 4
3 9 7 2
4 2 6 8 9
8 3 7
9 8 4
Hard #8
9 6 1 8 2
8 9 6
5 3 7 4
4 2 3 1
1 3 6 5
2 4
9 5 7
4 6 8 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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