Thoughts on the Benoni Defense?

This looks like a Benko gambit, when White gives back the pawn, at least the pawn structure is quite similar - 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.b6
But Black is some "tempos" down, as White has already played a4, Nc3 and e4.

This looks like a Benko gambit, when White gives back the pawn, at least the pawn structure is quite similar - 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.b6
But Black is some "tempos" down, as White has already played a4, Nc3 and e4.
Yeah, that’s why I don’t trust 2...b5. Loses too much development.

This looks like a Benko gambit
To me it rather looks like a load of nonsense - especially this 4.c4 move which does Black the favour to deny the c4 square to his own pieces (e.g. the b1 knight).

I'm inserting an inspiring benoni video https://youtu.be/x0TDJK973ms
In a must win with black situation: down 0-2 in a 24 games match
https://www.chessgames.com/perl/chessgame?gid=1044727

As a Queens Gambit player, the two openings I hate the most are Benoni and Grunfeld.
I could beat u with KID

I absolutely love the Benoni. I don't know what level your student is at, but it works super well for me, and definitely could for him if he's around my level. Against 1. d4 I play 1...c5, after which if they know the correct move (2. d5) I can play 2...e6 and 3. ... Nf3 to transpose into a normal Modern Benoni (which I have no problem with playing), and if they play something "safe" like 2. c3, 2. Bf4, or 2. dxc5, then I can have a very pleasant game. At my level, 1... c5 gives all the benefits of the normal benoni, and offers more ways for the opponent to play inaccurately and give me a pleasant position.
He is around 1700 FIDE.
Did you make any specific study on these other lines like 2.c3, 2.Bf4, etc?
Thank you.
I haven't done much specific study on them. Mainly, I just play intuitive moves- Nc6, d5, etc. A lot of times it transposes into a standard way of playing against the London, which is just fine with me, since the London isn't all that ambitious and I do well against it. I don't know if at the 1700 FIDE level the London carries more bite, but I'm always happy when my opponent tries to be "safe" and plays 2. c3 or something similar.
Basically, when I play the 1... c5 Benoni, there are three paths I see taken:
1. My opponent plays 2. d5, I play 2... e6, and we transpose into a normal Benoni. One can also play a Czech Benoni from 2. d5, but I don't like it very much.
This is completely wrong. It doesn't transpose, or shouldn't if white knows whet he's doing.
1. ...c5 is weak.
Hi Otto, if you prepare the repertoire for Benoni, then publish some part of it in your blog here. As usual we always wait for your blogs.
Furthermore once I finish publishing repertoire on KID, I am going to cover openings who has KID like structure or which can transpose to KID. And so naturally I will have to cover Benoni also.
But that will take quite some while. Because even though I have written some 20 blogs, I think I will still need 25 more articles just to scratch the surface.
It is natural for your student to sthit from KID to Benoni as both are related.
I have given you the link to book on your personal message. See if it can help you.
Dr Sanjay
Thank you for your kind words and considerations, Sanjay.
Yes, it shows how rich of ideas are these indian openings.
I´m not planning in writing at the moment but is an idea to be taken into consideration.
Cheers!