Printable Hard Sudoku

Set 14k2qd0. 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 5 8 6
4 9
2 6 3 5
4 6 3 7
7 4
9 5
4 7 9 2 1
3
8 6 1 5 4
Hard #2
1 5 2
7 8 9 3
5 4 8 7
3 9 4
2 4
7 2 6 9
9 4 7 3 1
5 9
8 6
Hard #3
1 4
8 5 3
7 3 8
5 9 6 4
4 3 5 1 6
2 3 4 9
5 9 6
7 4 2
5 8
Hard #4
2 3 9 1
9 3 5
6 9 3
1 3 5 7
3 7 8
9 5 8 2
1
3 2 4 1 9
7 6
Hard #5
5 4 1 8
3 6 4
8 5
8 9 3 4
4 6
6 5 7 9
9 6 7 8 5 2
3 1 6
7
Hard #6
5 6
6 4 5 1 8
2 1 6 8 5 4
6 3 9
1 7 5
4 1
7 3
9 6 3
8 4 6
Hard #7
2 9 3 6
7 2
9 3 2 1
6 8
2 1 3
3 9 2
3 1 8 9 5 4
7 5 6
4 3
Hard #8
4 5 7 3
6
4 3 8 2
2 3 9 7 6
4 8 7
5 8 3
2 8 7 4 3 1
6 2 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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