Serious 3NT Serious 3NT Serious 3NT is a contract bridge bidding convention. It is used in game-forcing auctions where a major suit has been agreed upon. 1–2 if using 2/1 Game Forcing or 2–3 (Agreeing spades) The next bid indicates suitability for slam: Since Spades are the agreed trump suit, Three No Trump is not usually the best contract. Using Serious Three No Trump, a bid of Three No Trump says "I am Serious about slam", i.e. "I have a good hand". Bypassing bidding Three No Trump says "I am not Serious about Slam". Examples shown in the above auction. If one
Jump bidding strategy is to jump if-and-only-if the signal is at least 36. So if Xenia's value is e.g. 33 and Yakov's value is 39, then Xenia will pass and Yakov will jump, so Yakov will win and pay only 24. In contrast, in a simple Japanese auction, Xenia will stay up to her value of 33, so Yakov will win and pay 33. This outcome seems counter-intuitive from two reasons: Jump-bidding is a very crude form of communication: it does not communicate my actual value, it only signals that my value is above a certain threshold. The careful selection of the