Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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