Printable Hard Sudoku

Set y5fld0. 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 9 4
1 4 7 8 9 3
8 9 7
5 6 8
9 1 2
3 1 9
5 7 3
9 4 1
2 8
Hard #2
5 7
9 8 5 3
3 6 1 9
1 7 4
9 6 8
2 4
5 1 4 9 7
7 6 8 4 2
2
Hard #3
3 8 1 9
9 2 7
8 9 3 5 4
6 7 9 3
8 4 6
7 8 2 6
7 8 1
9 6 5
Hard #4
1 3 7 6 8
1
6 9 7 4
5 6 9 8 1
3 1 4
7 6
7 5
4 9 1 3
3 7 2
Hard #5
7 6 1
4 1 9
1 3 2
3 6 1 5 4
9 7 6 3
6 2 5 1
6 4
9 7 6
2 5
Hard #6
4 7 8
5
2 9 6
9 3 6
2 1 9 5 8
7 1
7 6 5 4
3 4 2 6 1
8 2 3
Hard #7
5 2
7 9 4 2 8
8
5 2
7 3 1 9 4
6 9 2 7
3 4 5 1 9
8 4
6 7 3
Hard #8
5 4
4 2 7 1 6
7 2
8 6 4
4 3 1 2
9 2 1 8 3
2 4 7
6 2
1 9 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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