Printable Hard Sudoku

Set 19wxquz. 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 8 9 2 4
6 8 3 2
4 9
1 3
9 1
5 7 4 6 9
6 2
2 5 6
5 7 4 6
Hard #2
1 2 9 4
9 6
7 5 2
5 9 2 3
6 3 8 1
1 6 5
2 7 1
3 6 9
9 7 3
Hard #3
4 7 9
3 7
6 4 8 9
3 6 4
9 8 1
8 6 9 4
7 2 5 3
8 1 9
4 8 7
Hard #4
1 3 7 8
4 7 3
5 6
4 2 6 3
3 9 1
8 3 6 9
4 2
5 1 4
6 4 2 9
Hard #5
9 6 2
3 1 7
1 4 2 7 9
7 1
4 9 2
2 6 5 4
1 2 8 7 4
4 5
5 3
Hard #6
4
2 6 7 8
5 8 1 6
4 8
3 7 9 6 5
5 8 4 7
9 8 1
5 1 6
4 9 5
Hard #7
4 7 5 2 8
6
9 8 1 5
2 8 1
1 7 4 3
6 3 7 2
4 3 8 5
6 2
7 9
Hard #8
8 2 4
2 9
5 7 2 1 3
2 5 8 3
8 4 9 6 7 5
1
6 4 1
5 2 6 9 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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