The Squeeze-Trim-Endplay: Hand
This is a hand from actual play, contributed by Nigel Guthrie. This is from a university competition in the 60's.
The contract was 6. The opening lead was the 10. Declarer won the queen of clubs with the ace, then ruffed a club, Righty following with the king. This strongly suggests that clubs were 6-2. Declarer now led a diamond to the ace, and Lefty played the king. This strongly suggests a singleton king.