your variation isn't even possible, how does black play 9.... c5 when he has no c pawn? and why would you play Nce2 blocking in your light squared bishop, and how exactly are you going to play 0-0 when your bishop is in the way.....
French Defense-Marshall Gambit
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I just corrected my original post. I look forward to suggestions. :)
I could never figure this out
a possible line is 6 ... Bd7 7 Nxd7 Qxd7 8 dxc5 Bxc5 9 Nc3 Ne7 10 Bg5 f6 etc. with Black counting on active play to compensate for the isolani.
MCO-15 (2008) ignores Marshall's Mistake, er, Var in the FD. NCO (1999) shows 4.ed5 ed5 5.dc5 d4 6.Ne4+= in a footnote. ECO 2nd ed gives
12.O-O-O Nf6 13.Qg5+/- [C10/1 - Keres, Minev]. IMHO the easiest way to deal with it is to transpose as follows:
the best line for white after 1 e4 e6 2 d4 d5 3 Nc3 c5?! 4 exd5 exd5 5 dxc5 d4 6 Bb5+ Nc6 7 Bxc6+ bxc6 8 Nce2 Bxc5 9 Nf3 Bb4+ 10 Bd2 Bxd2 11 Qxd2 c5 now chess openings: theory and practice gives 12 0-0-0 but this looks suspect due to blacks attacking chances against the white king. what about possible play after 12 0-0