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,
History of Skat card held by the soloist. Since this solution was not satisfactory either, and idea by Carl Christian Adam Neefe was adopted whereby an auction was held to determine the soloist and trump suit. By bidding, however, further types of contract other than the basic suit contracts became possible. Early forms of Null and Grand were already being played in the 1840s. The Null was, from the outset, a plain-trick game and basically resembled its modern successor. The predecessor of Grand was called Ace Game ("As-Spiel"); it was the counterpart to Null and also had no trumps. The main difference between