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Be3 before castling: …Qxb3, then …e5
Via 1.c4 c6 2.g3, White plays Qb3 and Be3 before castling, and before your …e6. No more …Bc5: we trade queens, and the question becomes a7.
Reminder: in the 8…Bc5 line, White plays 10.Qc3. Which pawn move prevents b4?