Who is Playing What?

[Liebchen]

I found a challenge on the Civil War Game Club board for a campaign of Overland from a tester (after I had left the testing team) - found it too much to resist.

The condition was that I, as the Union player, had to select the western swing option.

When testing like that, does the designer ask the Rebel player to play without knowing which option the Union player has been asked to use? Or was the request by the opponent/designer, and if so, how will you factor in that intel?