Printable Hard Sudoku

Set 4rwem2. 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
7 5 3 8 6
4
9 6 4
1 4 7
3 5 2
8 4 3 7 9 5
2
5 2 8
6 4 3 1
Hard #2
8 4 7
2 1 9 3
3 6 1 8
4 1 2
7 5 9
5 6 2
1 5 6
2 9 7 5
4 6
Hard #3
7 9 4
6 3 9
5 3 8 2
3 8 2 5
1 9 7
6 1
9 7 8
8 2 6 4
6 9 2
Hard #4
4 2 6 5
5 8
9 6
3 4 1
9 2 5
6 9 7
1 7 5 8 2
2 7 3 9
9 6 3
Hard #5
7 9
8 5 4 3
3 2 8 7 5
5 2 9 8
7
4 1 6
7 3 2
6 3
1 3 7 2 8
Hard #6
1 6 4
9 1
1 8 9
7 9 1 3
1 5
5 6 7 3 2
3 2 4 5 8 6
8 4
4 3
Hard #7
1 9
6 4 1 3 9
7 5 8 1
8 2
5 7 3 9 4
4 5
4 7 9 5
6 3 1 4 5
Hard #8
3 6
6 5 1 2 7 3
5 9 1 4
7 2 6 1
5 8
1 4 5
1 7
2 4
5 2 3 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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