What is the Main line of the Caro–Kann Defence?
To start: White moves this pawn forward
Black responds by moving this pawn
Then White moves this pawn
Black replies by moving his pawn here
This is the Main line of the Caro–Kann Defence
1. This is the Advance Variation
If White takes this pawn
2. This is the Exchange Variation
3. This is the Fantasy Variation