Printable Hard Sudoku

Set 14898zm. 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
1 4 8 6
5 3 1 9 7
4 6
6
1 9 3 6 2
7 8 1 2
5 2 7
2 9 8 6
5
Hard #2
4 5
1 4 9 3 7
8 2 1
2 9 7 8
7 3 5
9 6 1
6 5 2 8
9 7 2
8 6
Hard #3
4 9 8
4 1 7
1 7 3 9
5 7 8 6 3
8 7 5 4
3 6
1 9 5
3 1
2 6 4
Hard #4
8 6 5 1
9 7
3 6 4 8 9
7 6 2
7 4 3 8
4 5
2 4 5 9
7 8 5
4 3
Hard #5
2
1 7 2 8 9
5 4 3 7
6 9
3 1 6
4 3 6
9 6 8 3 1
5 1 6 9
7 2
Hard #6
3 6 9 5 2 8
8 7 1
4 5 7
4 8 5 6
8 1
3 9
2 9
6 9 7 3
8 3 5
Hard #7
8 1 4 7
9 5 8 2 3
2 3 5
8 1
3 2 7 5 4
7 1 3
5 3 6
3
7 4 2
Hard #8
7 5 1 4 9
9 3 7
4 2 9
8 9
9 8 4 3
3 2 5
2 5 3
1 9 5
3 1 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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