The scoring system for bridge is very much more complicated than it is for whist. Fundamentally, it depends on whether or not declarer makes his contract or not. If he does not, the defending side collect penalty points. If he does make the contract his side wins points. How many points are won or lost depends on the scoring system (not discussed here). Harold S. Vanderbilt played a key role in designing the scoring system, and in 1927 the Whist Club of New York produced a code for contract bridge. They and the Portland Club of London became the authorities who guided the later minor changes to the rules.