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
Contract bridge published by the American Contract Bridge League. The majority of rules mirror those of duplicate bridge in the bidding and play and differ primarily in procedures for dealing and scoring. In 2001, the WBF promulgated a set of Laws for online play. Bridge is a member of the family of trick-taking games and is a development of Whist, which had become the dominant such game and enjoyed a loyal following for centuries. According to the "Oxford English Dictionary", "Bridge" is the English pronunciation of a game called "Biritch", which was also known as Russian Whist. However, the idea of a