If defense is the hardest part of playing bridge (and it is ) then defending at matchpoint scoring is the toughest challenge a player can face. Every trick matters, irrespective of the contract, and every decision is potentially critical. In "Thinking on Defense," Jim Priebe introduced the idea of visualization, picturing likely hands for declarer and basing defensive strategy on those. In this book he show how to apply the same methods when playing in matchpoint events, which means essentially every pairs competition.