A trick is when all 4 players Every play a single card. The one that plays very first is "primary" the trick. The very best card on the led fit wins the trick, unless anyone plays a trump card, which beats everything else. Also, I'm not retaining HAL Corp anymore, https://online-matching-games55421.rimmablog.com/32951932/the-fact-about-play-matching-games-online-that-no-one-is-suggesting