Today is the day I reveal a little secret of mine. "The rule of the square" is something I learned about when I was a kid, but I didn't really get it. After all these years, I still haven't managed to understand the rule! Luckily, you and I can both learn more about the rule of the square in my app, Magnus Trainer! Web: https://www.playmagnus.com/no/magnus-trainer/lessons iOS: https://apps.apple.com/us/app/magnus-trainer-train-chess/id1097863089 Android: https://play.google.com/store/apps/details?id=com.playmagnus.development.magnustrainer&hl=en_US #magnuscarlsen #worldchampion #chess