@Taljechin: thanks for google tip...
Usually I don't like to flame with the usual RTFF (my job is about computer, I know how hard is when nobody helps you because you "have not RTFM !?!")...but, I cannot enjoy post on forum which looks like one troll post..because other posts from fire999 are of the same kind (what to play against f4 ? ...) and because he did'nt take time to feel his profile or try to explain clearly his aim.
The question is not so far from the limit "What is the best line for Black ?"
Of course I have one answer for the thread question: best line for Black is the one you can imagine with all your natural skills, imanigation and knowledge to win the game as Black.
Lines I liked best are:2...c5 with a later Be7
A) 3.f4 Nc6 4.Nf3 Be7 5.g3 (5.Nc3?! novelty in game Lendwai-Uhmann,Graz 1991 d5! ; 5.d3 d5!? ) d5! with the excellent coverage of the KIA in Uhlmann's book about the French.
B) 3.Nf3 Nc6 4.d3 (4.g3 b6 5.Bg2 Bb7 6.oo g5!? Klein-Juegel,Eifel open 2004 (forum Chesspublishing) ; 4.Nc3 Be7 5.g3 d5 6.Bg2 (6.d3 Nf6 7.Bg2 Nd4 Chigorin-Schiffers,Nuremberg 1896) Nf6 7.oo oo Yousry-Amin,2003 8.d3 d4!? Taratakower's moves given by few books..Treybal-Tartakower,Pistian 1922 (ECG) ; 4.b3 Nge7 Velickovic-Ulibin,Ano Liosia 1997 (Jovicic) ;4.Qe3 a6 Vajda-Farago,Nagykaniska 2003 )
4...Be7 5.g3 d5 6.Bg2 (6.e5 f6; 6.c3 Nf6 7.Bg2 b6!? or 7...c4 Svetushkin-Annageldyev,Istanbul 2000) Nf6 7.oo b6!? 8.e5 Nd7 9.c4! Bronstein-Nowak,Sandomierz 1976 (Taulbut et ECG) Without this undermining move, Black will soon have counterplay 9....Bb7 (9...Nf8!? Balachov-Lputian,URSS 1980 (ECG)) 10.Nbd2 (10.h4 d4 Glueck-Seirawan,Philadelphie 1987) dxc4! =
C) 3.g3 Nc6 ; 3.d3 Nc6 transposes to A) or B)
D) 3.Nc3 Smyslov-Ivanchuk,1993 Nc6 Chigorin-Tarrasch,1893 (ECG)
E) 3.b3 Nc6 4.Bb2 Nf6 is maybe the original idea of Chigorin: White has an offbeat and flexible opening
F) 3.c3 Nc6 4.g3 d5!? (Dolmatov)