Printable Hard Sudoku

Set 1i013jd. 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 8 9 6
6 2 7 5
5 3
1 7 4 5
6
4 6 2 1 7
8 9
9 6 1 3 2
4 1
Hard #2
8 6 2 5
7 8 2 9
1 3
9 8 1 6
4 6 2
2 6 9 7
8
1 6 3 8
7 5 3
Hard #3
8 3 2 5
3 4 2
5 7 1 9 4
6 7 9 2
4 8
4 8 5
4 2 8 1
7 1 6
1
Hard #4
4 5 9 8
5 8 3 1
1 3 5
3
1 9 2
7 6 8 2
4 3 6
7
9 6 1 4 2 7
Hard #5
4 9 3 1
2 9
1 8 6
7 4 3 1 8
9 5 6 8 7
6 4
9 3
8 7
1 2 7 8
Hard #6
2 4 8 6 5
6 7
4 2
3 9 7 8
2 3 5 8
6 7
5 8 9 1
7 3 5
4 1 6
Hard #7
7 6 1 5 4 3
6 8 1
8 9
4
1 8 6 2 7
9 7 2
2 4 1 8
3 4 6 5
6
Hard #8
8 9 5 4 2
2 6
7 3
7 1 4 5 8
5 8 2 4 1
6 8 9
6 2 3
5
4 1 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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