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
Ninety-nine (trick-taking card game) each earns 20 points; if three succeeded, each earns 10 points; and if all four succeeded in a 4-player game there is no bonus. A declaration adds 30 points (to the declarer if successful, to the others if not); a revelation is worth 60 points (to the declarer if successful, to the others if not). Note that in the 3-player game, the maximum score in one round is ninety-nine (hence the name): 9 points for winning all nine tricks, 30 points for bidding 9 tricks and getting them (while no one else got their bid), and 60 points for a