Back then, he thought he was inventing a playback dictaphone machine, which would make life easier for clerks taking notation from bosses. He had no idea that his invention would spawn a multi ...

Rule 16 displays a chessboard and a game in progress, asking for the next best move in chess notation as the next addition to your password. But what if you’ve never played chess before?

American students have been falling behind in math for decades—with test scores that consistently rank in the bottom 25% globally compared to students in other developed countries—and the ...