Rubber bridge they must play a card of the suit led if they have one. A player who has no cards of the suit led may play any card either discarding or trumping. A trick is won by the highest card of the suit led unless trumps are played, when the highest trump wins. The winner of the trick leads to the next trick. The main article includes a detailed description of rubber bridge scoring with examples. Essentially, each winning bid's value is scored "below the line" (e.g., 3 Spades nets 90 points below the line) and overtricks, bonuses, etc. are scored
Common value auction on. There are two bidders participating in a first-price sealed-bid auction for an object that has either high quality (value V) or low quality (value 0) to both of them. Each bidder receives a signal that can be either high or low, with probability 1/2. The signal is related to the true value as follows: This game has no SBNE in pure-strategies. PROOF: Suppose that there was such an equilibrium "b". This is a function from a signal to a bid, i.e., a player with signal "x" bids "b"("x"). Clearly "b"(low)=0, since a player with low signal knows with certainty