Play a 4 player card game where Spades are considered highest valued card.
A 4 player card game where Spades are considered highest valued card. This game is also known as Callbridge. One human player will play against 3 computer controlled players. Players must make calls (i.e., claim that s/he will win that many tricks) after the first round. Sum of calls of four players must be at least 13, otherwise, shortcall will be triggered. In non-shortcall games, players must win at least same number of tricks as s/he made call to gain points. In shortcall games, players must win exactly the same number of tricks as s/he made call to gain points.