[fen "r1b2rk1/ppq1n1pp/3p4/3Ppp2/1bP5/3B1N2/1B1P1PPP/R2QR1K1 b - - 1 13"]
1...e4 is obvious, then white responds
2. Qb3 hitting black's b4 bishop. We need to save the bishop, and my candidate moves were as follows:
2...Ba5which I eliminated after some analysis, since it allows a removal of defender tactic with
Rxa5at some point.
2...Qb6which I quickly eliminated since it pins the e pawn.
I couldn't distinguish between
2...Bc5, and I fortunately played the correct move
2...a5 (which I thought was slightly better since it guards the c3 square, preventing white's battery). The move
2...Bc5 is faulty because of the following:
black's dark-squared bishop becomes trapped via the moves
3. Bf1 exf3 4. d4! Bb6 5. c5!and black cannot capture on c5 since
5..dxc5 e6+drops black's queen.
After seeing the solution, I feel there is no chance of me recognizing this in an actual game---I'd probably declare there to be virtually no distinction, and play a move to avoid wasting time. Maybe someone at a higher level than me might find it in a tournament game.
Question: At what level would a player be able to correctly analyze how ...a5 is superior to ...Bc5 if this puzzle arose in a tournament?
I'm trying to improve, and get an idea for how my improvement is going.