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 to make a game (nine tricks at notrump, ten tricks in hearts or spades, 11 tricks in clubs or diamonds), which yields bonus points if bid and made. East-West are "competing" in spades, hoping to play a contract in spades at a low level. 4 is the final contract, 10 tricks being required for N-S to make with hearts as trump. South is the "declarer", having been first to bid hearts, and the player to South's left, West, has to choose the first card in the play, known as the "opening lead". West chooses the spade king because spades is