GMs don't have a repertoire ?
Come on... For example:
Kramnik: Catalan and Berlin everywhere.
MVL: Najdorf and Gruenfeld are almost always played as black.
Nakamura: King's Indian Defense is a recurrent guest.
Aronian: the Ragozin countless times.
In his times, Kasparov had many periods when he plays certains openings a lot more than the others:
the Spanish, the Najdorf, the King's Indian (later abandoned for the QGD).
Of course, they don't play these openings exclusively, otherwise it would be very simple to prepare against them, nonetheless it's obvious they DO have repertoires.
calculation2 wrote:
"..., Top Gm's don't even pretend to have [an opening repertoire], so please..."
"Michael Adams is the last of the super-GMs whose repertoire we will be examinimg here. ..." - FM Steve Giddins (2003) in a chapter about "Some Players' Repertoires".