Rex Bridge is likely to become the contract, the valuation of the hand is again counted according to the Contract Bridge practice. A second major difference is the possibility to bid at level 8 and 9. This may seem awkward, as it would take 14 or more tricks to make a contract at level 8 or higher. Even if the declarer takes all 13 tricks, he will still incur a one trick penalty. However, the payment for a made grand slam can still outweigh several doubled penalties. How many depends on vulnerable or not. Consciously bidding higher than what the cards says
Bidding box in 1962 in Sweden by Gösta Nordenson and first used at a World Bridge Championships game in Stockholm in 1970. Eric Jannersten, a Swedish social bridge player and founder of the largest European bridge equipment manufacturer, Jannersten Förlag AB bought the patent in 1970 being attributed by some as the inventor. However, the patent is disputed by the Swedish Bridge Federation. They quickly became popular in Europe, and after some resistance were accepted in American bridge clubs. , they are practically an indispensable part of the game, and even many rubber bridge players use them at home. Use of bidding