Printable Hard Sudoku

Set 1lqhz6t. 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 7 1 5 3
3 4
5 8 6
2 8 9
6 8 4 1 9
1 4 5 6 8
7 8
7 6 1
5
Hard #2
2 8 7
7 2 8
8 7 3
9
8 5 6
7 3 1
2 1 4 7 3 8
3 8 1 9
7 2 1
Hard #3
4 6 2
1 8 7 9 4
4 7
6 3 9 5 8 1
8 1 2
8
2 7 3
5 7 1 6
9 6
Hard #4
3 4
5 4 7
2 1 3 8
9 6
1 3 4
9 6 4 5
8 7
3 7 5 2 1
2 9 7 5
Hard #5
4 3 8
6 8 1 5
8 4
7
8 4 5 7
3 5 1 7 4
8 5
2 9 6 1
1 3 4 9
Hard #6
8 5
8 1 6
6 4 1
2 4 6
4 7 9
5 1 9 3
2 7 3
3 6 2
5 3 7 4 8
Hard #7
8 2 3
6 5 9 3
2 4 7 9
6 3 5 4
8 4
3 6 5
7 1 2
1 9 8
8 2 4
Hard #8
9 1 5
5 6 2 1
7 3 1
6 3
1 7 8 3 4 5
2
3 4 5 6
3 8 7 1 2
9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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