Printable Hard Sudoku

Set qt061j. 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
4 8 1
5
7 6 1 8
2 9
9 8 1
8 1 4 9 7
2 6 9 5
3 4 7 6
5 4 7
Hard #2
1 9
2 5 8
1 8 9 7
6 4 8 3 7
7 9
5 7 2 1
9 1 2
4 6 5
2 4 3
Hard #3
3
5 9 4
3 9 2 5
9 7 5
6 2
2 8 3 4
8 7 2 4
3 1 4 9
4 8 5 3
Hard #4
2
5 8 2 3
1 9 4 7
2 1 6 5 3
8 9 4
4 5 8 3 1
8 5 4 3
3
7 5
Hard #5
7 2
6 9
9 4 3 8
5 6 1
1 4 9 3
6 3 7 4
4 1 5 8 7
3 6 1
2 4
Hard #6
3 5
4 7
7 6 8 4
5 6
1 8 3 7 5
3 4 1
9 6 3 5
2 5 4 6
5 1 4
Hard #7
8 4 2
6 1 4 8 5
9
9 8
6 2 7 1 3 9
3 1
7 4
2 7 8 9 3
1 6 2
Hard #8
6 8 4 2
5 6
3 7 1 6
2 6 5
7 8 2 9
7 5 4
8 6
9 3 7 5
9 2 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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