Printable Hard Sudoku

Set 14y4kk9. 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
6 2 3
5 3 4 1
7
4 2 7 6 1
1 9 4
7 1 9 5
5 4 1
1 3 8 6
3 9
Hard #2
8 6 7
5 4
8 5 2 6 3
6 3 7 1
9 7 2 3
1 4
4 6 8
5 9 4
3 7 6
Hard #3
9 3 5
5 8 4 1
3 6
8 9 3 7
2 6 8 3
2 8 9
8 4 6 9 3
1 6 4
2
Hard #4
7 3 2
1 5 2 7
2 1
5 3
4 6 3 1
1 3 9 7 2
8 9 1
6 1 2 4
6 9
Hard #5
8 9
4 7 8
8 1
8 1 3 6
8 7
3 7 2
6 2 5 9 7 4
4 8 5
9 5 1 3
Hard #6
2 3 8
8 7 9 3 2
3 5 9
8 1
4 7 2 9
2 1
1 8
5 3 9 1 7
1 4 5
Hard #7
7 2 1 9 3
9 3 7
6 2 8
8 4 2
5 1 4
9 2 3
3 8 5
3 9 2 6
4 8
Hard #8
2 4 9 3 1
1 6
9 1 5 2 8
4 3 5 1
7 3
1 9 4
1 6 9
4 5
8 9 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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