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In " scoring, which share most features, but differ in how the components of the score are accumulated. In duplicate scoring, the outcome of a deal presents a single number assigned to the pair who won the deal (the other pair receiving the same negative score by implication); in rubber bridge, that number is divided into two components: "above the line" and "below the line", both assigned to the winning pair. GENERAL In general, if the Contract was made, the score consists of the following components:
If the contract was not made, the side that defeated the contract receives
Contract points Contract points are awarded for the level of the contract, and depend on the Denomination and double/redouble (but not on Vulnerability ): Level bonus There are four types of level bonus, awarded for partial contract, game, small Slam and grand slam respectively. A '''game''' is any contract which is worth 100 or more contract points; for example, 4♥, 5♣ 2♠ doubled and 1NT redoubled are games. A '''partial contract''' (or '''partscore''') is a contract worth less than a game. The bonuses for games and slams depend on vulnerability. The part-score bonus applies in duplicate and Chicago bridge, but not in classic rubber bridge scoring: Slams are also games, so when scoring a slam, both game bonus and appropriate slam bonus are added. Other level bonuses are not cumulative. Double and redouble bonus When a (re)doubled contract was made, an additional bonus is added to the level bonus. It is Colloquial ly referred to as an "insult", meaning that the opponents have "insulted" the pair by stating their opinion that the declarer is incapable of making the contract. 50 points are awarded for doubled, and 100 for redoubled contract made. Overtrick points When the declarer scores overtricks, they're normally counted as contract points (30 for NT and major suits, 20 for minor suits), except when the contract was (re)doubled, when they are awarded substantially more ("adding salt to the insult"). In that case, the value also depends on vulnerability: Penalties When the contract is defeated, regardless of its level and denomination, only the penalty points are assigned to the pair who defeated the contract. The penalties are summed up for every undertrick, and depend on number of undertricks, (re)double and vulnerability: Without double and redouble, every undertrick has fixed cost of 100 or 50 points. The figures for (re)doubled undertricks are set up so that ''n'' vulnerable undertricks cost as much as ''n+1'' non-vulnerable ones; for example, 4 doubled undertricks non-vulnerable cost (100+200+300+300) = 800, the same as 3 undertricks vulnerable (200+300+300). DUPLICATE BRIDGE In duplicate bridge (and the kind of "home parties" known as Chicago), all the categories are summed up, resulting in a single figure. The following table shows some examples (X denotes a double and XX a redouble): RUBBER BRIDGE Rubber bridge uses the same values for tricks, bonuses and penalties, but they are divided into two categories: #Below the line are entered only the contract points #Above the line are entered slam bonuses, "insults", overtrick points and penalties wrung from the opponents. Partscore and game bonuses are '''not''' assigned; however, a form of game bonus is added at the end of the rubber, worth 700 points if the opponents did not score a game and 500 if they did. For details, see Rubber Bridge . In addition, special ( Rummy -like) bonuses (referred to as "honors") are awarded in rubber bridge for particular holdings in one hand, regardless of the outcome of the deal:
RECENT SCORING CHANGES If you read old Bridge books, you may notice some differences in the scoring rules. As of 1987 , World Bridge Federation imposed the following scoring changes for duplicate bridge, and as of 1993 also for rubber bridge (however, since there are no official competitions, rubber bridge players accept them as they see fit):
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