Question about the Winaver variation

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skyluke1989

Hi, I have a question about the French defense, specifically the Winawer variation. Playing with the explorer, if I reach this position with white to move, I see that the most common responses in master games are e5 (8291 games), Bd3 (44), Nge2 (10) and Bd2 (6). My obvious question is: how come axb4 is not even in the database? To me it looks the most obvious move, and the engine seems to agree with that (axb4 gives +3.1, clearly better than any other choices). What am I missing here? (maybe I have some problems in using the database?)

Thanks!

Laskersnephew
I’m pretty sure you’re misreading this. After 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.a3 Black almost always plays 4…Bxc3. But the main line goes 4.e5 c5 5.a3