In official tournaments, are the two players allowed to talk (before or at the start) of a match to compromise on openings, eg.
If white is good at the Sicilian but bad at the Caro-Kann and black is good at the Caro-Kann but bad at the Sicilian; could the two compromise to alternate playing the Caro-Kann and the Sicilian, to balance things?
I understand why this might be frowned upon, but are there any official rules (in FIDE or elsewhere) that explicitly prohibit this?