How do you play schafkopf?

Schafkopf is a traditional German card game typically played with four players using a deck of 32 cards (Ace, 10, King, Queen, Jack, 9, 8, 7). Players form partnerships, with the objective of scoring points through tricks won, typically by playing the highest card in the led suit. The game has various variations and rules, but generally, players must follow the suit if possible, and the highest card of the led suit or the trump suit wins the trick. Scoring is based on the points accumulated from the tricks won, and the game continues until a predetermined number of points is reached.