Printable Hard Sudoku

Set vpnlw2. 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 3 9
3 8
1 5
8 2 6
1 7 4 3
7 5 8
4
6 8 4 9 5 1 2
3 7 1 4
Hard #2
3 8 6 9 4
9 7 2 3 8
4 8 6
8 2 5
1 7
9 8 2 4
5 7 3
8 3 6
4
Hard #3
4 7 9
3 9 2
2 7 8 4 5
7 3 2
6 3 5 4
5 2 9
1 8
3 8 2
3 1 6
Hard #4
8 4 3
5 7 8
7 2 3 1 5
8 5 2
1 3 5 9 6
4 8 3 5
4 1
6 4
2 9
Hard #5
2
3 8 6
1 9 7
9 8 7 2 5
5 9 7
6 4 9 1
6 9 3 8 1
4 2 5
7 9
Hard #6
7 3 1 8 4
7 6 3
3 9 1
3 8 9 6
1 8 5 3
5
6 2 8
4 9 6
6 9 1
Hard #7
4 6 8 7
8 3 2
2 4 1 3
6 8
2 6 1 8 3
9 5
5 6 7
7 2 9
3 5 8
Hard #8
6 2 7
9 1 4
2 8 6
5 7 8 6
1 9
4 7 8 6
9 1
6 3 1
3 4 5 8 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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