Let's say someone tries the Crab opening on me (1. a4 e5 2. h4 ...) Is there any possibility to find out if this opening has been played before and how the game(s) went?
I know I can search for any particular member to see his games and if I'm lucky I find a member that likes this particular opening. Therefore can I learn much just by studying his games with this opening. (Is it cheating...?)