Closed Variation of the Boor Attack with 6...Bb4

I've been playing the Boor attack against the Slav lately. However, sadly the Slav has become less popular on Chess.com. Personally I blame GM Gregory Kaidanov.

Anyhow this was the closed variation where black plays Bb4 on move 6 to pin my knight instead of Nc6. While this seems like a natural move it is inferior to Bb4. But playing it requires care.

I definatley had an advantage at move 19. At that point the position became very sharp. We both made mistakes, but I was able to pull it off. I should study those position more, late middle and end game is often my weak point.