The Overbidder's Challenge

1. From which book was the following famous hand taken, in which the hero makes 7 redoubled?

Game All - - Q8765432 AQ1084 AKQJ AKQJ AK KJ9       N W        E       S 65432 109872 J109 - 10987 6543 - 76532

2. What is the minimum number of points needed to make 7NT against best defence?

3. You reach 7 on the following slender values - plan the play when North leads the 9. (Assuming that the opening leader has not underled KQJ, there is only one possible lie of the cards where you can make the contract.)

AK32 A9543 1032 4       N W        E       S 10954 2 AQ54 A1032

4. Often, rather than relying on brilliant play, you rely on awful defence. Can 7NT ever be made with a Yarborough in both hands? If not, what is the least combined strength for which it can be?

Look here for the results.