Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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