Printable Hard Sudoku

Set 14l3fpe. 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
1 9 3 8 6
5 4
8
8 2 5 3
7 4 2
6 1 5
9 4 6 7
2 7 9
4 9 5 3
Hard #2
7
8 6 5 3
1 9 3 2 6
1 7 4
3 9
2 1 4 9
1 4 6
2 8 1 3
6 8 4
Hard #3
4 9 6
5 6 3
3 2 1
3 5
6 1
1 7 9
1 3 5 2 8 6
4 8 6
2 9 1 8
Hard #4
3 6 8
9 3
6 8 1 5 3
3 2 8 9
9 1 6
1 4 3
7 2 6 9
4 1 3
5 9
Hard #5
5 7 8 3
7 9 6 5
8
3 6 7 2 8
8
8 2 4 3
4 5
6 3 8 4
4 5 9 1
Hard #6
1 4 8 9 3
7
3 1 8
3 9 8
7 1 2
8 5 7
9 1 8 7 4
5 6 4
7 2 3
Hard #7
4 2
3 2
3 6 8 7
5 8 4
2 1 6
1 3 2
1 5 3
3 9 1 4 5
7 6 5 4
Hard #8
8 1
4 5 1 2 9
3 6
4 6 5 1
2 7 1 4
5 4
3 1 4
2 7 9 6
9 4 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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