Printable Hard Sudoku

Set 14j8gtj. 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
8 9 5
7 2
1 8 4
5 4
9 8 3 4
7 1 2 9 5
3 4 2 5
5 6 3 7
3 7
Hard #2
3 9
1 4 5 3
7 4 6
9 7 5
6 4 3 7 1
8 9
7 8
1 5 6 7
2 4 8 5
Hard #3
7 9 6 3
4 7
1 8 6
4 7 3 5
6 8 5 7 2
2 1 9 3
8 4 3
5 9
7 2
Hard #4
8 3
7 8 4 6
9 1
9 4
2 5 7
1 4 3 5 2 6
4 8 7
7 1 6 5
6 5 7
Hard #5
2 8 6 5
7 9 4
3 9 2
7 3 9
4 3 1 2
1 6 8
7 3 6 5
4 8 2 1
8
Hard #6
4 7 3 8 6
8
5 7 3 4 9
8 7
9 2 7 3 8
2 8 5 9
2
7 9 1 2
7 3
Hard #7
9 4 8 6
4 6 1 3
3 7
9 8 1
5 6 7
1 9 3
4 6 1
5 9 3
1 6 4 2
Hard #8
8 4
4 1 5
5 8 6 3
9 2 7 1
5 7 6 3
3 4 7 9
9 2 7
2 9 3
3 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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