It is easier with visible cards

Hans Rosling is a Swedish medical doctor who rose to prominence when he produced a Ted Talk in which he promoted the use of data to explore development issues. He said, "My best friend in medical school was a magician. We were shown an X-ray of a sword swallower, and I tried it and failed. Then I got a sword swallower as a patient, and he taught me."

If you know how to do something, it seems easy. But until you do, it can appear very difficult.

At the bridge table, we would all play better if we had X-ray vision. In this deal, for example, what happens in three no-trump after West leads the diamond three?