Konter a Matt jack 1, 10 and 9 nothing. At the beginning of one game, the trump suit is fixed. Additionally, three cards are always trumps: the queens of spades Q, hearts Q and diamonds Q are always trumps. This is what gave the name to the game: the two queens of hearts Q and diamonds Q are the two Kontra trumps, the queen of spades Q is the “Matt”. As a consequence, in a match, depending on which suit is the trump, there are nine or eight trumps, four possibilities, the value of the cards is as follows (from highest to lowest,
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