fjd wrote on 06/07/17 at 22:10:14:
2. In the Classical Variation with 7...e6, where does his analysis meet Negi's?
First of all: The DVDs do contain some refreshing stuff, for instance against the Fantasy variation (not repeating ...d;e from Schandorff/Houska, but the attmittedly by Bezgodov strongest 3...e6) or two knights system.
At the same time there are quite some slips of the pen in the videos and you will have to study the accompanying analysis files to overcome this. This and the presentation overall is exactly why Sadler gives the DVDs only 2 (vol 1) resp. 3 stars (vol 2) in NiC 5/17 (admitting that his assesment would be better on the content alone). There is btw. another (and this time quite favourable) review (of vol 2 only at the moment) at chess.com by IM_Kgwm. But I'm probably still too new as a user to be allowed to post links. So check it out.
I've found additional confusing stuff to the one mentioned by Sadler when checking out the classical 4...Bf5 line you were asking about.
To begin with, Vidit gives the impression - both in the general introduction and in clip 06, that already 1.e4 c6 2.d4 d5 3.Nc3 d;e 4.N:e4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 e6 is completely new and not covered in recent literature. He even mentions at the beginning of clip 6 that the line is too new for Negis "otherwise excellent" (Vidit) book.
In fact, Negi does cover 7...e6 and even gives it a ! mark.
They meet (or rather separate) at Negi, page 419 after 8.Ne5 Bh7 9.Bd3 B:d3 10.Q:d3 Nd7 11.f4, when Vidit proposes 11...Be7.
Negi: "11...Be7 is not terribly important, and White simply replies 12.Bd2. Now 12...Ngf6 transposes to the later variation B2, while the greedy 12...Bh4 13.0-0-0 gives White a huge lead in development and is much too risky for Black."
Negi continues with his main lines for Black (11...c5 and 11...Ngf6).
Now, Vidit goes indeed for the greedy pawn grap, but only after 12...Ne5 13.f;e B:h4.
He has very new games by Giri, Mamedyarov, Ragger on his side with excellent results for Black, and this is the point where he should have mentioned "the line is too new for Negi's book."
I cannot say of course whether his lines will stand the test of time. But it becomes very sharp and so far the most critical lines haven't been played otb.
I'd just like to mention two of the confusing things I spoke about.
Here Vidit says in the video "White can't take on e7 because of 20.Q:e7 R:d2 21.R:d2 Q:h1+." and continues with the bishop moves. In fact, you might seriously consider 20.Q:e7, but of course not 21.R:d2, but 21.Q:d8 instead when White gets two rooks for the queen after all. It's probably equal anyway and a long line in the accompanying file shows it. But the video is not only shortened, but kind of contradicting here.
So, Vidit mainly analyses now 21.Bc1 and 21.Bc3 in the diagram position. After 21.Bc3 Nf5 22.Rh7 (not his main line).
he says something like "Black plays 22...Qe4 and is winning." (and repeats it at the end of the clip).
While Black is probably ok after 22...Ne3, the position after 22...Qe4 23.Rc1 might even be bad for him instead of winning. Only when you check the analysis file, you realize that Vidit probably mixed up this line with 21.Bc1 Rd7 22.Rh7, when 22...Qe4 is indeed the right move (and mentioned in the file).
So as I wrote: lots of refreshing stuff and good ideas. But you have to compare the video with the files. Probably better for players who already know the opening than as an introduction to it.
I haven't checked your other question yet.