Printable Hard Sudoku

Set mkgi2p. 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 6 4
3 6 5 4
2 4 8 5 6 3
9
2 8
9 6 1 7
7 3 9 1 6
2
3 7 4
Hard #2
6 3 5 4
7 2 9 6
4 1
6 3 2 8 5
1 8 5
5 7 3 2 6
3 2 4
9 1 3
Hard #3
1
8 6 5 2 3
5 9 8 7
4 7
1 5 3 8
5 9 7
1 6 4
5 4 1 6
6 9 5
Hard #4
7 1 5
5 1 9 8
8 9 2
2 9 6 4 7
4 7 1
3 5
9 3 4 6
1
8 4 1 5
Hard #5
7 3 2 6
9 3 8
4 3 9 5
9 5 2
8 7 1
4 6 9
1 4 6 8 3
9 5
8 3
Hard #6
9 2 5
8 2 1 7 3 9
3 6 2
1 4 3 9 7
3 6 2
7 2
4
7
8 4 3 5 6
Hard #7
7 2 5 6
2 4 5 1
8 9
6 7
2 1 9 5
3 8 1
8 5 7 9
9 8 6
1 9 5
Hard #8
3 5
7 8 6 2
6 2 8
1 3 7 5
3 4 9
7
4 8 5
8 7 6 2
2 4 6 5 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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