|Problem 5 Solution
East opens 4 and you bravely bid 4 ending the auction. West leads a heart and East plays a second heart, you ruff while West completes a peter. Which minor should you cross to dummy with to lead a Spade?
East is equally likely to be short in Clubs or Diamonds since you have seven of each. It is correct to cross with a Diamond. After you take the trump finesse and West wins, then if East can ruff a Diamond, having started with a singleton, East will be ruffing a loser.