Printable Hard Sudoku

Set 1j7g9vy. 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
8 9 1 4
5 2
5 3 8 7 1
6 2 4
8 1 3 7
9 6 5 2
3 4 7
8 5
9 1
Hard #2
6 7
1 2
3 8 1
5 8 3
3 1 9 6 7
2 8 4
6 1 2 5
2 3 6
9 5 3 2
Hard #3
4 8 6 3
2 5 4
9 1
2 6 3 9 5
7 5 6 8
9 2 3
8 9 1 6
6 8 1
7
Hard #4
1 5 8 6
9 4
6 7
7 9 5 1
8 5 2 4
1 8 9 3
6 1 8 5
5 3 6 2
7
Hard #5
4
5 1 3 7
3 8 9
7 5
4 2 9 8 7 5
6 9
1 3 7 2 5 8
6 7
7 1 4
Hard #6
9 3 1 7
4 6
7 1
9 5 8 2 1 3
5 7
8 6
8 9 3
2 6 7 1 9
2 5 8
Hard #7
3 9 7
4 3 8 2
8 5 4 3
5 4 1 6
1 5
8 9 5
9 1 8
1 5 7
9 1 3
Hard #8
4 9 7 3
9
5 1
1 6 7 2
3 7 2 5
5 4 7
1 3 2 4
3 9
7 8 4 9 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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