What is a trick in cards?
A trick refers to a group of cards where each card is contributed by a different player during play. In a trick-taking game (that is–a game that uses tricks as its central game mechanic), tricks will typically be won by the player who has played the highest-ranking card. This is called "winning the trick".
In most trick-taking games, players will take turns playing one card from their hand to the center of the table. Once each player has played once, whichever player has played the highest-ranking card wins the trick. Usually, the goal in these types of games is to either win the most tricks, win tricks only if they contain certain cards, or avoid winning tricks, especially if they contain certain penalty cards (such as the queen of spades in the game Hearts).
How does a trick apply the card game 4 Seasons of War?
4 Seasons is a trick-taking card game, albeit a rather unique one. Unlike most games of this sort, each player contributes two cards to each trick (except in the Team version of the game).
Another unique aspect of 4 Seasons is that unlike most trick-taking games where the goal is to win tricks to be rewarded with points, players try to capture tricks with high-ranking cards, because whatever tricks a player wins, these become that player's hand in the following round of play. This is a standard mechanic in the popular card game War (which is why this card game is called 4 Seasons of War). Don't worry if you think War is too basic for you, though; 4 Seasons is much more advanced, and incorporates very complex strategy.