Printable Hard Sudoku

Set 1gpw396. 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 1 5 3
8 1 3
2 7 9
5 4 2 7
1 7 2 5
4
9 8
8 3 2 7
4 9 7 8
Hard #2
5 1
2 7 3
3 6
4 6
8 7 9 5 4
4 6 8 9
2 7 6
4 5 2 1 9
5 8 4
Hard #3
5 2 9
1 2 5
9 1 5 8 4
1 6 3
2 5 4 9
4 7 6
2 9
6 3 7 8
6 3
Hard #4
6 9
8 7 9 4
9 4 1 2 5 8
7 6 8 1
4
9 8 3 5
2 7 6
8 5 9
4 8
Hard #5
7 3 4 9
2 9 8 1
9 7 5 8 2
2 1 5
3 7
3 8 7 4
3
6 8 7
8 1 5
Hard #6
7 3 8
5 2 9
4 5 6 2
3 1 7 4 6
8 7 2 4
6 7
1 6 4 8
4 8 2
6
Hard #7
6 7 3
4 9 8
8 2 7
3 8 7 4 6
4 7 6
5 9 3
2 1 3
2 7
4 5 9 2
Hard #8
5 4 7
7 8
2 1 4 5
9 7
7 9 2 4
7 4 9 5 1
6 7
3 5 1 8
2 5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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