Positional Theme #2 a-pawn vs b5 -- Part 3! (Final Part)
The simplest and often best defense to a2-a4 is to liquidate, ...bxa4:
To conclude: This is how to play against the advancement! Typically simply capturing the a4! pawn is best, because it leaves both sides with an isolated pawn on the queenside of the board as opposed to what typically happens when it is avoided: Weakening of the c4/c5/b6 squares as seen in part 2.
