Rikken is a somewhat more elaborate game of the same kind, played in the Netherlands. Vira is an elaborate 3 player variation of Boston, with some elements from l'Hombre. It has been claimed to be the national card game of Sweden, though it seems to be much less popular there now than in the past. In these games, normally for four players, the players facing each other remain as partners throughout the game. Contract Bridge is the most celebrated game in this group, with an enormous literature, and players throughout the world.
Spades is a another modern North American game.
Rather than the bidding being a competition to decide who plays a contract, all the players bid and all try to make their bids at once. In this respect it has some affinity with the exact bidding games , especially as there is sometimes a penalty for making too many overtricks. Some games are on the borderline of this and other groups. The Australian national game 500 has a bidding process similar to Boston, but its card ranking with jacks high in the trump suit identifies it as also belonging to the Euchre group . Russian Preference also incorporates bidding to take a number of tricks in exchange for the right to name trumps.