Printable Hard Sudoku

Set 1feqlf7. 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
3 7 1
6 1 2 4
8 3
6 8 9
2 9 3 4
1 5 6 4 2
7 1 9
3 8
8 4 2
Hard #2
6 4 7 2
7 1 6
9 2 4 8
2 6 1 7
1 8
4 3 1 9
8
6 1 7
8 2 6 4
Hard #3
1 6 4
8 4
9 7 6
8 1 4 5
2 7 8 9
6 4 2 3
8 9
3 1 2 8
2 6 7
Hard #4
1 8 2 7
2 6 5 7 9
5
4 6
1 8 2
5 8 9 6
6 9 7 8 4
4 9 6 1
7
Hard #5
4 2 8
3 8 5 1 7
9 2
5 2 4
6
4 8 3 5
9 8
2 8 7 3 1
7 6 1 3
Hard #6
6 7 2
9 5 8 7 3
8 1 9 3
7 5 3 8 6
4 3
1 3 6
1 9 5 4
3 1
8
Hard #7
8 5 2 7
7 8 1
4 7
9 8
5 9 6
7 1 5 2 3
2 9 1
6 8 1 4
3 2 6
Hard #8
6 2 1
4 9
5 6 1 3
8 1 9 6
2 9 1 6 3
3 5 7 9
5 2 8
7 5
2 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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