I agree with tug. I can't really see what 7...f5 accomplishes. Martin could just ignore it and play 8. e5. Then we've just made our kingside weaker and our g7 bishop is kinda dead (it's no longer putting pressure on d4).
Also after 7...f5 can't Martin just play 8. exf5 Bxf5 9. Bxf5 gxf5 10. Qab3.5+ and win the b7-pawn?
I need to ask you guys this "stupid" question. Martin's Bishop… by it moving to that half-move "four corners" can change its color, now, at will. Correct? Just asking this so that I get the clarification-understanding. It occupies any of those four squares, and moves like a Bishop from any of those four squares — thereby being either Black or White — for now. Just yes or no… don't go into detail.
Yes.