Small Improvement
A Trump lead (or switch) would have ruined declarer’s chances in Four Hearts, but West led a Club to his partner, who cashed two rounds then switched to a Spade. Declarer won the King and led a Diamond, West winning the ace and leading a third Club.
* Playing “Two-over-One”, where a Two-level response is forcing to game.** The shape and location of the high-cards (in the long suits)