Contract bridge grand slam exists. The modern game of contract bridge was the result of innovations to the scoring of auction bridge by Harold Stirling Vanderbilt and others. The most significant change was that only the tricks contracted for were scored below the line toward game or a slam bonus, a change that resulted in bidding becoming much more challenging and interesting. Also new was the concept of "vulnerability", making sacrifices to protect the lead in a rubber more expensive. The various scores were adjusted to produce a more balanced and interesting game. Vanderbilt set out his rules in 1925, and within
Rubber bridge Sidney Lenz. A total of 150 rubbers were played, and was ultimately won by the Culbertson team by a margin of 8,980 points. The match was a total success both for the game itself and the concepts of bidding as promoted by Culbertson. Rubber bridge Rubber bridge is a form of contract bridge played by two competing pairs using a particular method of scoring. A rubber is completed when one pair becomes first to win two "games", each "game" presenting a score of 100 or more contract points; a new game ensues until one pair has won two games to