I see a lot of people coming into minesweeper on twitch playing and not knowing how to use the chording technique. Even though manually clearing out flags is good for learning, chording is what made me addicted to minesweeper and enjoy the game in the long run, while also making the game easier and faster pace.
Course, on expert you can't just chord to victory but chording is the 1st step to get people hopeless addicted to minesweeper