What is so great about Bxa3? I only have about 35 games experience , so please excuse blunders.
I am in the following position. My app (dr wolf) wants me to capture on a3. However I fail to see either the extreme threat posed by the enemy Knight, or the extreme utility of the enemy vacating the b column, that would justify sacrifice (corr.: exchange) of my bishop.
[FEN &quot;r1bqkbnr/ppp2ppp/2n5/4p3/3p4/N1PP1N2/PP1BPPPP/R2QKB1R b KQkq - 0 1&quot;]

Can anyone explain the strengths of this move?
Black wrecks white's pawn structure

Black gains in development since he's trading an undeveloped piece for a developed one.

Although the center is sill fluid, black's dark square bishop is currently a &quot;bad&quot; bishop. in the short run, white's knight is the more active piece.

It removes the support of the c-pawn which opens up some tactical possibilities and also forces white to do something in the center rather than sitting back.