A fascinating thread, whatever one thinks of the opening!
Summarising the discussion thus far, several major tabiyas have been highlighted (each reachable by the usual mind-bending variety of move orders):
TABIYA 1 -- 5 Nc3 Nf6 6 Nf3 Be7 7 Be2 0-0 8 0-0 Na6 9 Re1 Nc7 10 a4 b6 11 Rb1 Re8 12 h3 h6 13 Bc4 a6 (Bohm-Konikowski)
TABIYA 2 -- 5 Nc3 Nf6 6 Nf3 Be7 7 Be2 0-0 8 0-0 Na6 9 h3 Nc7 10 a4 b6 11 Bc4 a6 12 Rb1 Qd7 13 Re1 (
NCO)
TABIYA 3 -- 5 Nc3 Nf6 6 Nf3 Be7 7 Be2 0-0 8 0-0 Bg4!? (Hoi-Ksieski)
TABIYA 4 -- 5 Bb5 Nd7 (5 …Bd7 is +/=?) 6 Nf3 Nf6 7 0-0 Be7 8 a4 0-0 9 Nc3, and now 9 …a6 (Rogers-Kengis) or 9 …Re8 10 Re1 a6 (Gligoric-Larsen)
There’s no firm consensus as to the respective merits of these lines, though T4 (which Franco-Benoni fanciers need to know White can effectively force, unless 5 …Bd7 is good) is sometimes considered inferior to TT 1--2. TopNotch (Reply 26) thinks all of these give White a good edge on the basis of Black being rather cramped and passive; but there’s evidence Kasparov thinks none of them offers White the best chance of a real advantage (on the basis of possible Black counterplay against d5); kylemeister (Reply 28) has suggested some possible ways forward for Black in T4, and it would be very interesting to know how Kasparov thinks Black should defend in T2! T3 meanwhile is more often noted than analysed; it might be +/=, but certainly isn’t bound to transpose to T5 below.
There are also the two Barcza variations of course (the second inferior to the first?):
TABIYA 5 -- 5 Nc3 Nf6 6 Nf3 Bg4 7 Be2 Bf3 8 Bf3 Be7 9 0-0 0-0 (Filip-Barcza)
TABIYA 6 -- 5 Nf3 Bg4 6 Be2 Bf3 7 Bf3 Be7 8 0-0 Nf6 9 Na3!? (9 Nc3 is T5) 0-0 10 Nc4 Nbd7 11 a4 Ne5 (Gligoric-Barcza)
Most sources accord White some edge, the interesting question being, how much edge is it?
There is, though, another plan for Black, which is mentioned in Harding’s article and Fields’ 1991 book but hasn’t been discussed here – that of strongpointing e5:
TABIYA 7 -- 5 Nc3 a6 6 a4 (Fields suggests 6 Bf4!? with no analysis) Nd7!?
TABIYA 8 -- 5 Nf3 Nd7!?
I can’t find any games stemming from T8 where Black implemented the plan. But T7 has led to:
(a) 7 Nf3 g6 and:
(i) 8 Bf4 Ndf6 (8 …f6 is b(ii) below) 9 Bc4 Bg7 10 0-0 Ne7 11 Qd2 (Muller-Stummer (corr.)), when Fields recommends 11 …h6 (12 Re1 g5).
(ii) 8 Bd3 Bg7 9 0-0 Ne7; here Harding-Steiner (corr.) went 10 Ne4!? Ne5 11 Bg5 0-0.
(b) 7 Bf4 and:
(i) 7 …g6 8 Qd2 (8 Nf3 see a(i) above) and now Fields suggests 8 …Ndf6!? 9 Nf3 Bg7 10 Bc4 Ne7 11 0-0 h6 12 Re1 g5, idea …0-0/ …Ng6.
(ii) 7 …f6!? (principled, if nothing else!) 8 Nf3 g6, when Wiedenhofer-Kerinnis (corr.) continued 9 Bd3 (9 Be2 Nh6 10 Qd2 Nf7 11 0-0 Bg7, Emanon-Fields) 10 0-0 (10 h4!?) Nf7.
What do folk think of these latter plans? Maybe TT7 and 8 are a recipe for hanging on rather than for fighting chess, but some would say that’s true of the F-B as a whole!
Finally a couple of move-order wrinkles. After 5 Nc3 Nf6, White can choose 6 Be2 in order to prevent T5, but then according to Fields Black can try 6 …g6, e.g. 7 Nf3 Bg7 8 0-0 0-0 9 Bf4 Bg4 10 Nd2 Be2 11 Qe2 Nh5 12 Be3 f5 (Maksimovic-Hulak). And after 6 Bb5 Nbd7 7 a4 here, Suba has tried 7 …g6!? (7 …Be7 8 Nf3 0-0 9 0-0 is T4). Of course there are many other move-order nuances, according to what one wants. For example, 5 Nf3 Nf6 6 h3!? Be7 7 Bd3 0-0, and now 8 c4 might be tedious for Black (8 Nc3 is a possible route to T2).