Corrospondence game, 5 days a move.
I would not play 11. ... a6, 11...d5 is a much better move IMO.
if you do play 12. exd5 black can easily get equality.
Hm, I doubt 13.f4 is immediately good move, whats wrong with 13.Ndb5 or Bh6 first?
Pulling up the computer
Bh6 would lead to something like 13...Bxe5 14.Bxf8 Kxf8 15.h4 Bf6 16.Nde2 e6 17.O-O-O Bd7 where I like whites placement,but it still not awful for black.
13.Ndb5 leads to something like 13...Bxe5 14.Qxd5 Bxc3+ 15.Nxc3 Nf6 16.Qd4 Be6 17.O-O Qxd4 18.Bxd4 a6 19.Bxf6 exf6 20.Ne4 f5 21.Nd6 b6 22.Rfd1 Rfd8 23.c4 Rd7 24.b4I was using 14. f4 as it is the book line in the book I have (which may be out of date)
Wow, a hard fought game. Looks like both sides fought hard for the initiative!