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
Design for Bidding Simon's earlier book "Why You Lose at Bridge", itself "widely perceived to be the best book ever written on Bridge." "Design For Bidding" "remains wonderful reading, because Simon argues persuasively for the Acol "state of mind" style of bidding." The book is divided into three parts: I, The Inexactitude of Bidding; II, Enquiry into Bidding; and III, Design for Bidding. Part I is a long general introduction, in seven chapters. In it, Simon sets out what he calls the "deciding factors" to be assessed before adopting a specialised meaning for a bid: Part I concludes with Simon's description of Acol