I just found a book in the Kindle bookstore that (incompetently) rips off some of my sudoku puzzles. The book is called “The Most Difficult and Hardest Sudoku Puzzles” and is “copyrighted” by one Johnny Cohen. Here’s the cover: The cover helpfully informs you that the book is a BEST SELLER. Here’s a sample of […]

I made four of these laser cut music boxes as christmas gifts to my family. The pattern was generated with a Processing script, which I wrote. The lid contains an inlaid Hilbert space-filling curve. On each of the sides is a colorful J, representing each of my four family members (our names all begin with […]

I’m currently working on an interactive Sudoku page (to be followed by other puzzles as well). If you’d like to play with a very early “beta” version of it, you’ll find it here. The page is designed to work in modern web browsers (Safari, Chrome, Firefox 4+, IE 9+), and also works on iPads. A […]

This weekend I compiled the data to produce the above graph, showing the level of activity on Twitter. I figured this out using a commonly known method. Every tweet has a unique id number, for example the 20 that appears in the URL of this tweet which kicked off the service: http://twitter.com/#!/ev/statuses/20 Assuming these id […]

Some weeks back, I used Facebook’s open graph API to read about 1.2 million names from Facebook users. I used it to construct this file, which shows, for each name, the number of times it occurs, the number of times it’s used by males, and the number of times it occurs in females. To keep […]

My Whitney Music Box made the front page of Reddit today, and is being picked up by a few other sites. Here are some blog entries I wrote about it, back when I was working on it: Visual Harmony A φ Fractal Dan Piker’s Whitney Variations HensTooth Discs Whitney Music Box simulation Also check out […]

Apparently, the paltry few KenKen puzzles published in the Times weren’t enough, so a number of you wrote to me asking for KenKen puzzles. I’m publishing a new kind of puzzle called a Kennie. It’s similar to a KenKen, but has a few minor differences. Kinda like those chocolaty sandwich cookies that aren’t exactly like […]

I’m currently working on a significant update to my classic Colr Pickr. Stay tuned.

This weekend, I counted all the words on Project Gutenberg. This has been done before, notably, here. My script crawled most of the English language books on Project Gutenberg (about 20,000 titles), and counted how often each word appears, and how many books each word appears in. The script ran for about 20 hours. You […]

[NOTE: I’ve posted some recent developments at the bottom. ] I’ve been blatantly cheating at foursquare for the past week. I didn’t mean to start the week this way. Most of my friends know me as a responsible father who occasionally plays piano at local open mics, and makes puzzles. Last Sunday, while checking into […]