Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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