Daily puzzlers would be quick to tell you that sudoku, Wordle’s mathematical cousin, is not as easy as it looks. The small grid, found often next to a word scramble or comic strip in a print newspaper ...

A robot built out of Lego can solve a Rubik’s Cube in about 3.2 seconds, but some 40 years after I first picked up the iconic puzzle, I’ve yet to solve it on my own. I assumed that successfully ...