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
500 (card game) the bidding team successfully fulfills its contract, then it receives the full points of the original bid, and the team calling breach loses points. -Lose/Lose: If the bidding team does not fulfill its bid, but the opposing team does not take the necessary number of tricks to perform a breach, then the bidding team loses the point value of the original bid, and the team calling breach loses the predetermined value of the breach call. -Lose/Win: If the bidding team loses its bid by the pre-established number of tricks, then the bidding team loses the contract points, and the team