Bridge: Count the shape for play

J. William Fulbright, a Senator representing Arkansas from 1945 to 1975, said, “We must dare to think ‘unthinkable’ thoughts. We must learn to explore all the options and possibilities that confront us in a complex and rapidly changing world.”

It is only a successful bridge player who listens carefully to the auction and uses the information to guide his defense. In this example, how should West hope to defeat four spades after he leads the club ace?