Printable Hard Sudoku

Set xsq56f. 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 1 7
9 5 1 4
6 3 4
4 2 7
8 7 5 3
3 6 9
2 6
2 7 5
5 4 1 6
Hard #2
8 3
2 6 1 5
9 3 1 8 5
3 9
4 8 1 3
6 2 5
7 9 2
2 6 5
9 8 7
Hard #3
2 5
7 8 6
8 4 1 9
5 2 9
3 6
7 1 9 3 8
9 1 2 8 5
7 3 9 4
2
Hard #4
5 1 4 3
6 3 8 1
2 6
9 5 4 7
3 2 9
9 4 8
7 5 1 4
9 4 6
1 9
Hard #5
4 1 3 2
2 3 7 8
6 9 5
3 6 1 2
9 4 8
5 3
4 8
9 7 2
6 8 7 4
Hard #6
7 2
7 6 5
9 8 4 7
5 1 8
1 5 9 4
4 6 2
3 7 5
8 6 3
2 7 4 1
Hard #7
2 3 6
5
8 6 9 7
4
5 8 4 3
4 1 5 7 2 8
3 1 6
2 6 3
7 9 2 6
Hard #8
3 7 1
9 7 4 5 6
1 8 6 4 5
6
1 2
8 2 7
4 6 1 5 9
7 5 3
3 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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