Printable Hard Sudoku

Set 19vw2hl. 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
2 6 3
8 2
7 4 9 3
6 5 9
5 1 2 8
2 5 1 7
2 7
7 2 8
1 4 6 5
Hard #2
3 7
9 4 3 6
1 8 3 6 9
5
1 6 5
7 2 4 3
6 3 7
6 2 8
3 7 1 6
Hard #3
5 9 7 6
2 8 6
3 2 1
2 3 9 1
9 6
7 4 8
9 1 4
6 5 3
3 4 1 7
Hard #4
8 5 4
7 3 2
3 8 4 1 5
6 1 4 5
4 1
9 8 3 4
2 7
6 5
7 4 6 8
Hard #5
7 3 5
8 6 7
5 4 3 2
9 1 5 6
5 9 3 8 7
2 4 1
3 4
8 1
4 2 9
Hard #6
7 2
1 8 3
7 3 9
5 1 4
5 9 2
2 8 7
4 7 1 5 9 3
2 4 7
5 8 4
Hard #7
8 1 6
7 8 5
3 9 5 4 7
4 7 5
3 8 2
4 8
7 5
1 5 2 8 9
8 5 4
Hard #8
5 4 2 1
8 3 6 5
8 3
8 2
9 6 8 4
4 2 3 6
1 7 2 4 3
6
2 7 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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