Dear MNb,

first thank you for the responce to my first post here

I would like to ask you (or someone else) advise

Recently i started to play Bird's 91.f4), as it allow me to play KG and Grand Prix, while avoiding all other responce to 1.e4, which i do not like. With 1.f4 d5 i sticked to classical system. the classical dutch I choose as responce to 1.d4, as this is similar to the way I play agaisnt flank openings (system with d6, e5 and f5). My question now is what to play against 1.e4? Till now I played Modern/Pirc system, but would like to change (or to add new).

i know that you are playing classical dutch a lot, and as responce to 1.e4 French is your choice. if not french what would you suggest? Why you choose french?

thnaks in advance

Bohdan

Jones-Williams is a very puzzling game indeed. If he was confident in his new idea, why didn't Williams continue? Furthermore, we shouldn't forget that Jones lost badly as Black in this line (v Parker, British Ch. 2006).
Maybe Glenn will give this line some attention?

Well, I've done some comparing, and I still don't get a clear answer to my question.  So here are some lines to clarify:

1.d4 f5 2.c4 Nf6 3.Nf3 e6 4.g3 Be7 5.Bg2 0-0 6.0-0 d6 7.Nc3 a5 8.Re1 Ne4 9.Nxe4 fxe4 10.Nd2 d5 11.f3
and Black has four choices:

a) 11...e3 12.Nb1 dxc4 13.Bxe3 looks good for White to me;

b) 11...c5? looks bad due to 12.fxe4 dxe4 (12...dxc4 13.d5 b5 14.e5 exd5 15.Nxc4!) 13.dxc5!  White is much better;

c) 11...Nc6 12.fxe4 dxc4 13.e3 looks pretty good for White, as 13...Bb4 can just be met with 14.a3 and an advantage (IMO).  This leaves only:

d) 11..exf3 12.Nxf3 Nc6 (12...c5!?).  Now, according to my database this has only occured once(!), so there's not much to go on.  I understand that Black may be able to meet b2-b3 with a5-a4, and that ...Bb4 can be annoying at times, but...basically with so little information it isn't clear that this is that much better for Black than the line after 7...Ne4.  And anyway, if the other line was supposed to be quite good for White (+/- maybe), it seems reasonable that White can prove a +/= here.

I'll keep looking at the position...

Maybe I'm missing something, but if the line 1.d4 f5 2.g3 e6 3.Bg2 Nf6 4.Nf3 Be7 5.0-0 0-0 6.c4 d6 7.Nc3 Ne4 8.Nxe4! is supposed to be strong for White, why isn't the similar  7.Nc3 a5 8.Re1 Ne4 9.Nxe4!? played more often?  It isn't clear to me that the inclusion of Re1 and ...a5 favours Black. 

Paul,

Do you have any games you'd care to share that demonstrate the strength of 7...a5?  Apparently, I need to work on that part of my repertoire.

Thanks!

6/7...a5 never really bothered me.  I'm much more concerned when Black acts like the Dutch is a fighting weapon and threatens the center directly with 7...Qe8.  Even 7...Ne4 is more worrisome than 7...a5.

Of course, I don't play international chess tournaments, so my concern lies mostly with the U2400 crowd. But I did score one of my wins against an IM who played 7...a5.  I didn't play the most topical response and got berated for my cowardice afterwards.  The game itself isn't so special, but it was nice to beat a 2500+ IM.

I thought 

1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d6 7.Nc3 a5  was completely serviceable..

what am I misssing?