Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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