Bidding box for home-played games. Use of bidding boxes has several advantages over oral bidding: it reduces noise in the room, prevents bidding being overheard at neighboring tables, allows easier review of the auction, and reduces the opportunity to pass unauthorized information to one's partner (intentionally or not) by the manner and intonation in which one makes one's bid. A bidding box is typically a plastic box with two slots, each containing a set of bidding cards. One slot contains 35 cards with symbols of bids (5 denominations—clubs (), diamonds (), hearts (), spades (), and notrump (NT)—in seven levels of bidding,
Suit (cards) value. Tarot decks have a dedicated trump suit. Whist-style rules generally preclude the necessity of determining which of two cards of different suits has higher rank, because a card played on a card of a different suit either automatically wins or automatically loses depending on whether the new card is a trump. However, some card games also need to define relative suit rank. An example of this is in auction games such as bridge, where if one player wishes to bid to make some number of heart tricks and another to make the same number of diamond tricks, there must