20,000 Hard Puzzles



These are the “hard” puzzles, midway in difficulty between the Standard Puzzles and the Advanced Puzzles. Like the advanced puzzles, you need to apply an “advanced” technique, but not to the same extent as the advanced puzzles.

The puzzles are available in printable form as PDF files. Each file contains 100 puzzles, with 2 puzzles per page.

If you really enjoy these puzzles, consider making a contribution to support the continued existence of this web site. Click on the Tip Jar below to make a $15 payment via PayPal. Think of how much you have to pay for Sudoku books in the store. And think about how many puzzles you can download from this site.

Puzzles

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Answers

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