Wow, it’s been a while since I’ve posted here! I’ve been collecting some material for a book on computer-aided puzzle construction and publishing. I’ll get around to the book eventually, but some of the material probably has a relatively short shelf life, so I thought it would be good to put some of it in […]

NOTE: This post was edited Jan 2nd, to reflect a modification to the settings. If you are doing the interactive puzzles on the puzzle website, you have probably noticed that when you complete a puzzle, instead of getting a pithy quote, you get an illustration (often, but not always, of a hedgehog, sometimes a kitty […]

Starting Monday April 20th, 2020, Krazydad puzzles will appear in The New York Times, where they are being published in the print edition as Two Not Touch. This is part of a larger effort to expand the puzzle offerings in the Times to a full half-page, a much-needed resource in these challenging times. I have […]

Editor’s note: Hi folks, meet Heather Moore, who I’ve been collaborating with on Pixidoku puzzles. Heather is a math teacher and has some great tips to offer for those of you who are looking for at-home learning activities for your kids. Take it away, Heather! — Jim In the midst of a global crisis, I’ve […]

The Alexa Game is a multiplayer game I made up in which the object is to correctly predict whether Alexa (or Siri or Google) can answer a question. Rules: Players take turns being the Interrogator. The Interrogator comes up with a question to ask Alexa, and makes a prediction as to whether Alexa will answer […]

Dearest Krazy Dad, I hope this message finds you well and that your new year is off to a wonderful start! I just made a small donation through PayPal and also wanted to write you a personal message. I was born and raised in the US and during my elementary school years in a “gifted” […]

I was recently talking to another puzzle maven, and the subject of how I measure the demand for specific logic puzzles came up. I’m interested in puzzle demand because it helps inform the choices I make when I add new puzzles to the website. It occurred to me that my methods may not be as […]

The latest addition to my puzzle menagerie is STAR BATTLE, a newish (well, 21st century, at least) puzzle that was originally created by Hans Eendebak for the 2003 World Puzzle Championship. If you like Suguru you will probably find these fairly easy to get into, as they are somewhat similar. But instead of placing numbers, […]

Celebrity rankings, based on the number of prayer candles for sale on Etsy, 2018 EDITION 1. Tupac Shakur 2. Beyoncé Kanye West 3. David Bowie Princess Leia / Carrie Fisher 4. Dolly Parton Harry Styles 5. Britney Spears Notorious Biggy Smalls Lana Del Ray 6. Drake Kim Kardashian 7. Leo DiCaprio Snoop Dogg Lady Gaga […]

I started publishing print-on-demand puzzle books a few months ago, and I’m now up to 22 books. Yay! The latest are four volumes of Killer Sudoku, available in Large Print and 4-per-page. The most popular, at the moment, are the “Tough Kakuro” and the “Stupendous Suguru” books. The easiest way to find my books is […]