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 will always win the item for free. Such cooperation could be very beneficial to both bidders in the long run. The problem is, it cannot be enforced, because both bidders have an incentive to say that their value is higher than it really is. Here jump-bidding comes into play. It works like a signaling game. By jump-bidding, the jumper signals that he has a high value, and so the other bidder should quit immediately if his value is lower. Two bidders, Xenia and Yakov, participate in an auction for a single item. This is a common value auction with the