The problem first appeared in 1869. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A chess problem that has stumped mathematicians for more than ...

A mathematician from Harvard University has (mostly) solved a 150-year-old Queen's gambit of sorts: the delightful n queens puzzle. In newly self-published research (meaning it has not yet been ...

If you have a few chess sets at home, try the following exercise: Arrange eight queens on a board so that none of them are attacking each other. If you succeed once, can you find a second arrangement?