Now I’m jealous, you get advice from so many D players. Now the pressure is on you, lol
You have no idea and I’m serious.
(also maybe post more games for reviews people, the system is open and willing it’s too bad it’s only getting my games)
Yes B increses the liberties of blacks group from 3 to four.
I thought about an intuitive reason why B works and A doesn’t, but I believe it would be more confusing than helpful, if anything. My perspective is, it’s really just a matter of figuring out the possible follow-ups.
After Black A, the variation in the game shows that Black gets captured.
After Black B then White A is a logical move, because it extends Whites liberties while reducing Blacks. But the problem is that Black follows up with P2, which does the same thing and puts Black at 3 liberties, and White at 2. Afterwards there are only moves that fill a single liberty, so Black wins the capturing race.
After Black B, any other attempt by White to rescue the two stones also fails after few moves.