Hear - Hear !!

Dear all QGD lovers! I am very sorry for not coming up to your expectations. You are absolutely right - some important systems and variations are still not covered or only half covered on the site. 

Certainly, I am not an expert in ALL more than one hundred opening lines, which can arise after 1. d4 d5 2. c4... I started with my favourite systems, then little by little added many others. By the way, you may have already found some important systems of the QGD - such as Exchange Variation, Cambridge Springs, Tartakower, system with 5. Bf4. Please be realistic - I could have hardly written so huge amount of books quickly - one man can hardly substitute a number of chess writers and cover thoroughly all the systems. I have been trying to do my best and many openings, in my humble opinion, are excellently covered.    By the way, I was going to cover the Lasker system in the nearest future but now my plans are corrected - it will come exactly this month! 

In conclusion, I would like to ask you for a little help. Every month a lot of games are played in such openings as Slav, Semi-Slav, QGA, the most popular QGD system 5. Bf4 etc. so I keep an eye on them first of all. Then I could have obviously missed some important games in the other systems, which were played in the last few years. So, if you think that some particular game is important and deserves to be published on the site please do not hesitate to draw my attention to it. Let's use the Forum for mutual benefit! 

With warm regards,
Ruslan

The Catalan is covered at the end of the QGD book (E00-E09 is the Catalan).  It's just covered in a QGD move order instead of a Nimzo move order.  I haven't looked much at the Nimzo/Benoni section as I don't end up in that territory (I play 1.Nf3, go Anti-Nimzo against that set up, and transpose to QGD, KID, Old Indian, Dutch, etc. and against 1.d4 I play 1...e6 and if 2.c4 I play 2...d5, so no Nimzo for me), but 1.d4 d5 2.c4 e6 3.g3 Bb4+ won't always, but will often transpose to a Bogo-Indian assuming Black eventually plays ...Nf6, so you might look there.

To answer your question as to why does everyone cover it with the moves you mentioned...it can also come from 3.Nf3 and 4.g3, but that just transposes to the 5.Nf3 lines anyway.  As for other moves on move 3, they just transpose to other openings, and therefore belong there.  For example, if 1.d4 Nf6 2.c4 e6 3.g3 c5, you end up most of the time transposing to a Fienchetto Variation of the Benoni, which would be in "Nimzo & Benoni", while 3...Bb4+ would probably be in the lines of the "Bogo-Indian", and if not exactly that, most of the time it will transpose to a line of the Bogo.

However, I don't seem to know of any opening that would transpose to the Orthodox QGD that would cause me to figure it to be in another section other than 1.d4 d5, but alas, there is nada in the D60's.  I guess they assume there is no such thing any more as 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7.  I seem to recall seeing this line quite a bit, and in the past I have played 7.Qc2, but have been looking to perhaps learn the 7.Rc1 lines.  It seems, however, that 6...Nbd7 must be refuted or something since it seems to get ignored here....apparently the only good move now is 6...h6 and 7...b6.  Very Depressing.  Not depressing enough to discontinue subscribing, as I get lots of info from the French (Which I play religiously as Black), Dragons (1.Nf3 often transposes to Maroczy-Bind positions of the accelerated), d-pawn specials, King's Indian, Daring Defenses, and Flank Openings, but the d4 d5 section gets limited attention as it lacks the most important of all d4 d5 lines (luckily enough, at least the Slav and Semi-Slav are covered).  I guess 6 out of 7 isn't bad (can't validly comment on the other 5 sections as they really don't apply to my reportoire).

Is there any logical reason why the Orthodox lines (D60-D69) aren't covered at all in the d4-d5 section of the website?

It seems to cover a couple of lines, but completely lack others.  The Cambridge Springs and Tartakower are included, but where's Lasker's Variation?  Or what about the entire D60-D69 section dealing with the Orthodox where Black plays both Nbd7 and Be7?  Is that not like, the most important theory in all of the Queen's Gambit?