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 case, where there is always a SBNE (see first-price sealed-bid auction). The following example is based on. There are two bidders participating in a second-price sealed-bid auction for an object. Each bidder "i" receives signal "si"; the signals are independent and have continuous uniform distribution on [0,1]. The valuations are: where formula_5 are constants (formula_6 means private values; formula_7 means common values). Here, there is a unique SBNE in which each player bids: This result is in contrast to the private-value case, where in SBNE each player truthfully bids his value (see second-price sealed-bid auction). This example is suggested as