Printable Hard Sudoku

Set j6jzig. 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 4 5 6
8 2 1 3
5
2 6 1
1 2 3
2 3 4 5
9 5
3 6 4 7 1
9 8 1
Hard #2
1 8 3 2
8 5 3
7 8
3 1 4 6
7 5
2 6 9
4 5 7
9 4 5 3
9 7 4 1
Hard #3
5 9
3 7 8 5 2
6 8 7 1
7 6 5
6 8 2 9
1 3 7
9 3 1 4
3 6 4 1
Hard #4
3 8
6 1
7 8 9
4 3 5 2
6 5 4 1
1 5 2 4 3
5 4
1 6 5
6 5 9 8
Hard #5
9 7
9 1 4
4 2 9 3
7 4
1 6 9 5
2 5 7 8
2 3 7 1
6 7 8
4 3 5
Hard #6
6 9 1
2 8 5
7 3 5
9 7 4 3 1
6 2 9
2 8 4
4 8 6 7 3
3 5 4 8
Hard #7
3 1 9
2 9 4 3
4 6
8 3 2 6 1
9 5 8
8 6 4
2 6
8 2 1
6 5 7 1
Hard #8
5 6
8 7 4 3
6 3 2 7
7
7 4 1 5 6 9
3 8 1 7
8 9 3
9 8 5
2 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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