Hello, I'm Dewi Williams, the founder of PuzzleMadness.
I started PuzzleMadness in 2009 with a simple aim: to make good puzzles that anyone can play every day. Today the site has over 80 types of puzzle, from classics like Sudoku and Nonograms to Slitherlink, Numberlink, Kakuro and many more, with new puzzles published daily.
I've worked as a software developer for over 20 years. I began my career making video games for the PlayStation 2, Nintendo Wii and Nintendo DS, before moving into web development. PuzzleMadness brings both of those together: building software that's carefully designed, and making something people enjoy playing.
Every puzzle on PuzzleMadness is made by software I've written myself, not bought in from a third party or produced by AI. Each puzzle is checked to make sure it has exactly one solution that can be reached by logic alone, with no guessing. It's also graded so that its difficulty is consistent with the other puzzles at the same level.
The puzzle player is built in-house too, so I can keep improving it based on feedback from the people who use it every day.
Alongside the website, PuzzleMadness supplies puzzles to newspapers, puzzle book publishers, websites and app developers. Every order is exclusive to the customer and comes with a licence for commercial use in print and digital formats. If you're interested in publishing puzzles, take a look at our puzzle supplier page.
When I'm not designing puzzles or writing code, I'm usually out running. I've completed a number of marathons (my PB is 2:58, which I am very proud of!) and have been running mountain ultra-marathons in the last few years.
I read every message and always welcome feedback, puzzle suggestions and bug reports. You can reach me through the contact page.
Thank you for playing!
Dewi