Printable Hard Sudoku

Set 1bmj7qd. 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 9 2
8 6 3
5 8 1 9
1 4 3 9 5
7 8 1 3
2 1 4
2 6
9 3 7
1 6
Hard #2
8 5 7
2 9
9 1
2 1 3
6 3 8
3 1 8 9 2 5
6 3 9 8 7
7 3 4
7 1
Hard #3
4 7 9
9 5 4 8
5 2 1
3 2 4 1
9
1 9 2
9 1 5 8
7 3 5 1
1 8 7
Hard #4
8 7 6
1
6 3 2 9 4
2 5
6 1 3 4
5 9 3 1
7 8 4 2
4 9 6 7
1 9
Hard #5
7 2 8
9 1
4 8 2
4 3 6
5 8 6 7 9
8 2 4
7 5 2 3
3 1
1 9 5 7
Hard #6
6 8 3 1
3 1 5
5 7 3
1
4 6 5 7
6 5 9 2
2 1 7 6 8
8 6 4
7 4
Hard #7
9 1 7 5 4
4 2 8 7
1 9
3 2 5 6
6 9 2 4
3 8
4 1
7 8 5 1
7 6
Hard #8
3 7 5
7 5 4 2 1 9
4 1
5 6
9 1 8
1 4 9 5 3
9 6 8 4
1 7
4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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