The Big Idea Behind The Caro–Kann Defence
White moves this pawn forward
To control these key squares
Black counters by moving this pawn
And creates a solid pawn chain in the center
Then attacks this pawn
White defends it by moving the Knight
Black still wants to take this pawn
White takes Black’s pawn
And after this move
White attacks the Bishop
Black retreats
Black counters by moving this pawn
He wants to trap the Bishop
So Black replies by moving this pawn
And after this moves
White pushes this pawn again
He wants to exchange his light-squared Bishop
And develop the Queen
White has better development and more center control
In exchange, Black got White to weaken his Kingside
After this development move
White should castle Queenside (to protect his King)
And Black should castle Kingside (to protect his King)