Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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