Printable Hard Sudoku

Set 1y3jwmu. 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 6 8
7 4 8 5
7 6
9 1 3 7
7 2 4 9
5 9
2 8 5
8 6 3 9 4
7 6
Hard #2
6 5 1 3
6 5 7 1 9
2 4 5
9 4 2
8 3 4 6
9 4 7
5 6
3
2 5 8 1
Hard #3
5 9 8
9 5 2
2 4 5 6 7
8 2 9 5
1 5 3 4 9
1
2 8 6 9 1 4
5 6
Hard #4
3 7 9 5
5 4 6
6 3 7
1 8 7 5
6 9 7
2 4
7 3 1 4 8
2 5 7
1 9
Hard #5
2 6
5 6 3
7 4 8 5
9 4 8 5
6 4 8
8 3 9 2
9 6 2
5 8 3
8 4 9
Hard #6
2 1 9
9 8 2
4 7
7 1 9
3 6 7
9 5 8
4
6 2 4 5 9 7 1
5 4 6 3
Hard #7
3 1 7
7 5 6
8 9
9 1 6 2
5 6 9
6 7 1 4 8
9 5 6
1 5 3 2
4 3
Hard #8
2 9 8
1 9 3 2
2 7 1
3 9 5
2 1 6
6 7 3 5
2 6
3 5 8 9
7 5 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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