Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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