Printable Hard Sudoku

Set 1hwm6wj. 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
5 3
3 8 2 5 9
8 4 6
5 1 7 3
8 7 5
7 5 6
5 6 9 1 7
9
1 3 5
Hard #2
5 4 2 8
7 2 3
8 2 9 1
1 2 4 9
3
4 5 1 6
8 4
4 7 5
9 5 3 8
Hard #3
9 2 3
5 4 1
9 5 2
4 7 8
1 3 6 2
2 1 4
5 6 8 4
4 1 5 6
1 8
Hard #4
4 6 7 2
2 9 4 1
9 1 5
8 3 6 9
4 8
4 1 6
4 6 2 7
8 3 2 9 7
Hard #5
6 9 7 1
1 2
7 6 2 9
4 6 3
9 6 7
4 8 7 3
7 4 3
2 6 4 1
5 7
Hard #6
6 3 7 4
9 3
5 6 4 1
3 7 8 1 2
5 1 7 6 9
9 8 1
1 8 3 2
2 7
Hard #7
8 2
5 9 1
4 7 8
2 6 4 8
1 8 7 3 4
5 9 1
8 5
2 4
5 7 1 6 3
Hard #8
3 6
8 1 7 9
3 1 6 2
4 3 9 7 6
5 8 4
9
9 8
7 3 5
6 4 1 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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