Printable Hard Sudoku

Set tq3kqd. 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
6 2 8 3
4 3 6 2
1 9 6 7
7 9 3 2
8
5 7 4
4 5 7 8 1 3
8 2 9
Hard #2
6 5 7
6 5 7 9
1 4 6
8 3 4 1 7
5 8
7 2 5
2 8
9 8 5 6 2
6 7
Hard #3
6 7 9
8 5
9 5 2 3 8
4 9 8
1 6 9 5
4 5 1 3
5 4 3
2
7 2 9 8
Hard #4
8 9 4 6
7 5
7 3 1 9
6 3 7 9 2
3 4
1 9 8
5
1 4 8 7 2
4 7 2
Hard #5
5 9 4 8
7 4 2
5 2
9 5 7 1 2
3 2 1 7
4 2 5 9
4 5
2 3 1
6 9
Hard #6
1 9 8 6
6 8 3
1 2 8 5
6 7 4
8 7 5
9 1 6 2
5 7 4 1 2
4 8 7
Hard #7
6 4 2
2 3 5
8 9 6 4
4 8 2
6 3 1 7 4
7 9
7 6 4 3
2 6
8 7 4
Hard #8
8 7 6
3 7 8 4 2
7 1 4
3 2 5
6 9 8
5
9 3 2 6 7
2 5 4
1 6 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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