Printable Hard Sudoku

Set 1vvf7kg. 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 4 1
3 2 7
9 1 5 4
6 7 3
3 9 4 6 8
2 1
1 6
6 4 5
8 3 1 6
Hard #2
1
2 8 5 4
8 2 1 7 3 9
5 8 3
3 7 1
1 6 4
1 2 5
8 9 2
2 4 3
Hard #3
2 9 3
5 2 4 1
7 8 9
3 8 1 5
1 5
5 2 9 7
6 7 4
4 1 6
5 4 2
Hard #4
1 3 4
5 6 3 7
6 4 1 8
8 3 7 6
5 2 8 3
9 1
3 4
9 4 2
4 2 6
Hard #5
4 3 2 6
8 7
2 4 1 8
6 1 8
5
7 3 2 4 9 8
2 3
1 4 8
4 1 7 6
Hard #6
2 5 3
6
8 5 6 9
8 5 4 9 2
2 3
1 8 6 5 2
6 5 1 8
8 7 1
7 3
Hard #7
6 5
5 3 4 8 1
6 5 8
9 5 2
3 5 1 4
7 6 9
7 1 5 9
2 4
9 2 7
Hard #8
8 9 3 6
6 3 1 5
5 2 9 6 8
6 4 7 2
9 8 3
8
1 7 9 4
4 2 1
6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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