The first time I was allowed to travel beyond the Iron Curtain and visit the West was in 1980. I ventured from Hungary to New York for the International Toy Fair, where a puzzle I had invented was ...

If you want your children to pick up the skill, make sure you know how to do it, too. I struggled through my entire childhood to solve the cubes. So when I bought it for my children, I didn’t want to ...

Yet another bastion of human skill and intelligence has fallen to the onslaught of the machines. A new kind of deep-learning machine has taught itself to solve a Rubik’s Cube without any human ...