Printable Hard Sudoku

Set emf026. 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 9 8
8 9 2 3
6 3 5 7
2 9 8 4
5 9
3 4 2
3 6 5 1
6 3
9 7 8
Hard #2
8
5 4 8
1 4 6 9
4 2 6
2 4 6 8 3 9
8 9 3
2
7 3
1 3 5 4 9 6
Hard #3
5 2 3 8
3 9 8 2
2 8 7 4
5 3 2
8 5
1 5 3 6 9
8 5 3
9 2
4 6
Hard #4
5 7 6 1
7 4 3 8
2 8 7 4
8 2 1 4 5
3
2 9 8
4 8 7 3
5 8 9
6
Hard #5
9
1 5 8 6 3
3 9 6 1 4 7
6 5
9
1 5 3 4 2
8 2 1
4 5 1 7
2 8
Hard #6
1 7
3 5 4
1 9 6
8 3
9 3 8 6
7 6 2 1
8 1 6 4 9
1 2
5 9 4 8
Hard #7
7 2 3
5 6 1
8 2 9 6
3 5 7 1 9
9 3 4 7
1 7
6 5 9
8 1
3 7 4
Hard #8
6 2 5 4
9 7 3 8
2 3 7
9 5 4 7
7 4 1 5
1
8 5 9
4
3 5 7 9 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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