What is the Petrosian Variation?
To start, White moves this pawn forward
Black replies by moving this Knight
White moves this pawn forward
Black responds by moving his pawn
White puts his Knight here
Black fianchettoes his dark-squared Bishop
White replies by moving this pawn forward
Black moves this pawn
White puts his Knight here
Black castles Kingside
White responds by putting the Bishop here
Black moves this pawn forward
White responds by moving this pawn
This is the Petrosian Variation