Printable Hard Sudoku

Set 4y1wg2. 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 2 6 8
7 5
2 8 3 6 7 4
4 7 5 1
2
2 4 1
5 1 3
6 7
1 8 9 5
Hard #2
8 1 2
2 6 8
5 9 2 6
6 2 8
1 2
5 6
8 2 5 3 4
4 2 9 5
3 1 7
Hard #3
1 4 6 9 5
3 2 7
6 5 1 2
7 3 2 6
8 5 4
2 1
5 6 7 3
4
8 5 9
Hard #4
2 6 7 3 8
8 9
4 9 6 1
2 8 3
9 5 1
8 6
9 1 2 6
5 3 9
8 1 7
Hard #5
8 1 5 3
5 8 1
3 8 4 9
4 5 6 9 8
6 8 7 4
9 1 3
4 1 5
7 1 8
Hard #6
3 6
9 8 2 5
5 6 7 2
9 1 6 4
7 5 2 9 8 1
9
5 3 2 4
8 7 3
6
Hard #7
5 6 3
4 1 2 6 7
3
7 4
6 7 5 8
5 8 6 9
6 2 1
1 9 8 4
5 7 9
Hard #8
4 1 6 7 8
5 3 6
3 1 7 8
2 9 3 1
4 5 9
5 6
8 3 6 7 2
5
4 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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