Instead of giving his partner the diamond ruff, he shifted to the heart 10.

What should he do to prevent the likely diamond ruff?

South would then have had no way to prevent a diamond ruff.

West took the queen and gave his partner a diamond ruff.

East expected, in the teeth of the evidence, that he could give his partner a diamond ruff.

And there was a chance of giving East a diamond ruff.

The defense began with two top diamonds and a diamond ruff.

A diamond ruff and another heart lead left East with the same problem.

When East won, a diamond ruff would have done no good at all.

In this case the save was due to cost 1300, since the defense scores a diamond ruff.