A bid of a new suit shows first-round control (ace or void) there, but is not compulsory with such a holding.One ace, and the kings of all suits previously bid by either partner.Two aces, and the king of any suit previously bid by either partner.
Description Ī bid of four notrump (subject to common-sense defined exceptions) shows either: In contrast, the Culbertson 4-5 describes the bidder's hand, and invites partner to use their judgement in the light of that information. Most four-notrump conventions ( Blackwood and its variants being the best known) demand that bidder's partner define their hand using agreed codified responses. It was devised in the early 1930s by Ely Culbertson. The Culbertson 4-5 notrump is a slam-seeking convention in the game of contract bridge. Slam-seeking convention in contract bridge
