The Knight's tour is a traditional chess problem where a lone knight is placed on a chess board and must visit each square only once. You can play this perfectly simple free implementation created by u/psrwo on Reddit. The source code is at github. The knight is randomly placed at the outset.
I can't visit more than fifty-something squares, because I'm terrible at stuff like this.
Here’s a puzzle from Martin Gardner’s Mathematical Games column, which ran for many years in Scientific American. I found it in his low-priced Dover edition anthology, My Best Mathematical and Logic Puzzles. Imagine that you have three boxes, one containing two black marbles, one containing two white marbles, and the third, one black marble and […]
Simon Anthony is cohost of a sudoku YouTube channel called Cracking the Cryptic. In this video he solves a difficult sudoku puzzle with extra constraints. It’s really fun to watch him solve it and get more excited as his sense of wonder grows (“This is like the universe is singing to us,” he says as […]
Here’s a fun puzzle with an easy setup that makes for a good stay-at-home time-filler. Like sudoku, see if you can rearrange these cards so that no face or suit repeats itself in any column, row, or diagonal. Watch the video if you need some help.
Not every house has a fireplace. And to be honest, not every homeowner wants to deal with the hassles and maintenance of a fireplace. But it’s tough to argue that the intoxicating glow and dance of a licking flame isn’t mesmerizing, not to mention all of a fire’s practical uses. For those looking to enjoy […]
Knowledge is power. And a company that knows who its customers are is far more likely to see those customers return. On the web, information gathering often comes in the shape of an online form. Whether it’s a registration, a contest, an order, or just a simple contact, those opportunities to engage with users and […]
It’s impossible for anyone to truly escape the effects our COVID-19 lifestyle changes have made, but if you’re a web developer, there’s a decent chance your work life might be virtually unchanged. Even before the quarantines and work-from-home orders, over 16 percent of web developers were already self-employed. And with a growing number of tech […]