Printable Hard Sudoku

Set 1t1tvw7. 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 6
1 6 8 2 4
4 8 5 1 7
4 3 5
1 2
9 8 1
5 3 2
2 7 4 6 8
3
Hard #2
3 4 9
7 2 8
4 5 1 6
4 8
1 3
2 8 4 1 5 9 6
7 4 3
5 1
5 6 2
Hard #3
2 6 4 9
3 6
6 9 3
8 9 4
2 5
4 1 8 2
3 4 8 1
1 2
9 8 6 4 7
Hard #4
5 9 6 4
6 5 2
8 1
1 7 3 2 9
8 4
5 2 4
9 8 7
6 7 1 5
3 6 9
Hard #5
4 9 6
3 2
1 5 7 8 9
5 2
2 6 3 1
3 7 9 1
7 6 3 4 1
7
8 2 5
Hard #6
9 8
7 5 9
3 7
8 1 2 7
6 8 3
2 3 8
9 4 1
4 7 2 9 6 5
2 6 8
Hard #7
9 5 4 1 7
1 8 4
2 4
5 3 6
7
1 7 5 6
3 9 2 7
7 6 4
8 5 9 2
Hard #8
4 1 8
1 2 8 4 3
7 6 5
5 8 4 6 2
3 5
9 6 1 7
4 5
6 2 7 8 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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