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
Trick-taking game hold an auction for it. The most popular games of the 18th-century was tarot which experienced a great revival. During this time, many tarot games borrowed bidding over the stock (taroc-l'hombre). In the 20th century, Whist (now with bidding and the dummy hand) developed into Contract bridge, the last global trick-taking game. It is possible that the origin of the practice of counting tricks (in plain-trick games) was the counting of cards won in tricks. It was therefore a logical development to accord some cards a higher counting-value, and some cards no value at all, leading to point-trick games. Point-trick