Printable Hard Sudoku

Set 64iq2w. 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
8 1 3 4
9 1 6
5 4 8 2
2 3 7 9
9 4
7 2 3
5 9
2 6 7 4
9 6 2
Hard #2
9 6 7
5 1 2
7 5 8
8 1 4 9
7 4 2 6
1 7 5
2 5 9 7
4 3 2
4 5
Hard #3
6 8 1
4 7
1 4 3
8 3 9 5 1
7 2 9 4
3 1 8
2 9 4
6 7 4 5
8 4
Hard #4
8 1
3
2 7 5 3
5 6 4 9
9 7
8 1 6
2 4 8
5 4 1 2 6 7 3
8 1 4
Hard #5
4 7 8
9 3 8
8 5 9 1
4 3 7 2 6
1 6 4
2 6 8
2 5 4
4 5
1 9 3
Hard #6
2 6 7 9
7 9 4 6
3 1 8
2 9
5 4 6 7
6 8
6 5 1 3
1 2 3 6
4 9
Hard #7
9 5 2
5
7 9 6
4 6 3
9 2 1 7
1 8 3
3 6 2
9 1 4 8
4 1 2 7 5
Hard #8
6 8 2 9 3
8 3 4
7 5 4 2
9 6 7
6 1 8
4 3
8 1
3 5 2 4 9
9 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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