To discover which opening lead is best from a given West hand against a particular auction, the authors use computer software to generate 5000 deals that match the North-South bidding. (The West hand remains the same and the other three hands are chosen randomly).

The software then plays these deals automatically, seeing which of the 13 possible opening leads works best at both IMPs (rubber bridge/Chicago) and match-point pairs.

By analysing the results, the authors pass on to the reader the secrets of finding the best lead against notrump contracts on a wide range of different auctions.

Winning Notrump Leads was a ground-breaking and very well-received book that used the power of computers to determine which opening leads work best against a variety of auctions at notrump. Using enhanced software, the authors now turn their attention to suit contracts. They generate millions of random deals, retaining those that match the chosen auction, for example 1S-2S-4S. By playing these deals automatically against each of the 13 possible opening leads from a given hand, they are able to discover which lead is most likely to beat the contract (also the best lead at matchpoint pairs). The authors provide insightful commentary to each result, answering timeless questions such as: When should I lead a trump? When is a doubleton a good opening lead? Should I lead differently against a partscore? Should I make an aggressive or a passive lead? Should I lead an ace against a small slam? Which leads work best against a grand slam? By using the number-crunching computer power available nowadays, there is no longer any need to rely on general opening-lead guidelines passed down by our ancestors. We think you will be surprised by many of the discoveries made during this investigation! DAVID BIRD (top) and TAF ANTHIAS were contemporaries at Cambridge University, both reading mathematics. They carried out research and development on software systems for over 30 years at IBM's UK Laboratories. In the 1970s they formed a successful bridge partnership, winning a number of national events. David is now one of the world's top bridge writers with 116 books to his name. Taf moved on to the USA, where he became a vice president of Cisco Systems. They have joined forces on this ground-breaking book.