Your nurse has a good memory.
Latest edition of Encyclopedia of Chess Openings

Fezzik, I am not even familiar with the book you mention... COTAP ?? I have several books on the Fischer Spassky match of 1972 but dont have the one you mention..... strange. I have only one on their return match in 1992.

Ouch ! Yes, I did but I just didnt recognize the acronym .... silly me . One of my first books was by Horowitz & Reinfeld : How To Improve Your Chess

I'd be content to know that I'm at least learning chess tabiyas, which I believe is chess jargon for theoretical main lines.
I own MCO 15, but am I gettting chess tabiyas or Nick de Firmian's opinion on how best to play the Ruy Lopez Exchange, as an example?
Isn't 4...bxc6 after 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.BxNc6 in the Ruy Lopez a bad move? In our Game Explorer, a new player to chess might think it's a good move, since it has an official ECO code/title of C68: Ruy Lopez - Exchange Variation, Lutikov Variation. Who the heck is Lutikov anyway, and what was this person thinking?
Even though Black captures away from the center with the move 4)...dxc6, this recapture is better than 4)...bxc6 because files and diagonals are opened for Black's Qd8 and Bc8.

I'd be content to know that I'm at least learning chess tabiyas, which I believe is chess jargon for theoretical main lines.
I own MCO 15, but am I gettting chess tabiyas or Nick de Firmian's opinion on how best to play the Ruy Lopez Exchange, as an example?
Isn't 4...bxc6 after 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.BxNc6 in the Ruy Lopez a bad move? In our Game Explorer, a new player to chess might think it's a good move, since it has an official ECO code/title of C68: Ruy Lopez - Exchange Variation, Lutikov Variation. Who the heck is Lutikov anyway, and what was this person thinking?
Even though Black captures away from the center with the move 4)...dxc6, this recapture is better than 4)...bxc6 because files and diagonals are opened for Black's Qd8 and Bc8.
Just because it's named doesn't mean it's good.

I'd be content to know that I'm at least learning chess tabiyas, which I believe is chess jargon for theoretical main lines.
I own MCO 15, but am I gettting chess tabiyas or Nick de Firmian's opinion on how best to play the Ruy Lopez Exchange, as an example?
Isn't 4...bxc6 after 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.BxNc6 in the Ruy Lopez a bad move? In our Game Explorer, a new player to chess might think it's a good move, since it has an official ECO code/title of C68: Ruy Lopez - Exchange Variation, Lutikov Variation. Who the heck is Lutikov anyway, and what was this person thinking?
Even though Black captures away from the center with the move 4)...dxc6, this recapture is better than 4)...bxc6 because files and diagonals are opened for Black's Qd8 and Bc8.
That's interesting, so De Firmian actually recommends 4. ...bxc6 ? I've never seen someone recommend that move. On the other hand, probably De Firmian has some analysis to back it up.

A tabiya is a position, in particular a position that is often reached in the theoretical duel between players who are booked up on a particular opening. A line is a series of moves.

By definition, QGD is 1.d4 d5 2.c4 + anything except for 2...dxc4. It looks obvious to me. How the heck Slav defense would not be a part of QGD?

By definition, QGD is 1.d4 d5 2.c4 + anything except for 2...dxc4. It looks obvious to me. How the heck Slav defense would not be a part of QGD?
That discussion is over. The QGD is treated as JUST 2. ...e6 in common parlance.
The discussion is not over, many members disagreed with U. The Slav Defense is very developped now, so it deserves to be treated separately. But formally, it's still a part of QGD.

I'd be content to know that I'm at least learning chess tabiyas, which I believe is chess jargon for theoretical main lines.
I own MCO 15, but am I gettting chess tabiyas or Nick de Firmian's opinion on how best to play the Ruy Lopez Exchange, as an example?
Isn't 4...bxc6 after 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.BxNc6 in the Ruy Lopez a bad move? In our Game Explorer, a new player to chess might think it's a good move, since it has an official ECO code/title of C68: Ruy Lopez - Exchange Variation, Lutikov Variation. Who the heck is Lutikov anyway, and what was this person thinking?
Even though Black captures away from the center with the move 4)...dxc6, this recapture is better than 4)...bxc6 because files and diagonals are opened for Black's Qd8 and Bc8.
That's interesting, so De Firmian actually recommends 4. ...bxc6 ? I've never seen someone recommend that move. On the other hand, probably De Firmian has some analysis to back it up.
Sorry for the confusion.
In MCO 15, Nick de Firmian does not recommend 4...bxc6 in the Ruy Lopez Exchange Variation after 1.e4 e5 2. Nf3 Nc6 3.Bb5 a6 4.Bxc6.
" (a) 4...bxc6?! 5. d4 exd4 6. Qxd4 leaves White in control of the center." - Nick de Firmian, MCO 15th Edition
My comment on 4...bxc6 is in regards to our Game Explorer and the fact that a famous Russian chess player, Anatoly Lutikov, would play what is considered a dubious move. It would be nice to see marks like (?!) in Game Explorer, but only for those few moves where no titled player would disagree.
One titled chess player thinks the Exchange Variation in the Ruy Lopez is garbage! I happen to like this variation for both White and Black, right now.
In the two games below, Lutikov plays 4...bxc6 and pulls a draw in both games. Maybe his idea was simply to draw against White's Ruy Lopez by effecting an early queen trade, among other things. Now that I look at it more closely, it's clever and simplifies things for Black.
In the second game, Anatoly Lutikov works much harder to get White to trade queens, as White seems to have no interest in doing so. Clever stuff.

A tabiya is a position, in particular a position that is often reached in the theoretical duel between players who are booked up on a particular opening. A line is a series of moves.
Thank you. I had forgotten that.

This ie what I don't like people arguing or putting others down based on there experience or chess you should guide and teach if your better equipped rather than make derogatory or condescending remarks to others chess is a great universal tool not a subject who's brighter than who and who knows what

In its heyday, ECO had some of the top GMs doing the analysis and you got some of the best anylsis available. Now most to the work is done by IMs and ECO is becomming a data base dump.

http://www.jeremysilman.com/book_reviews_js/js_eco_b_3e.html
I found a review of Jeremy Silman's and he claims the newer editions of ECO are rubbish. Which edition is worthwhile? I've got 0 opening books and have to make heads of tails by going though games myself in my database. Are the book(s) available online or only on paperback? I'd like to take a look at it.
chessgod101.com , kupdf.net and ebook777.com are some of the places from where I download chess pdf and softwares (chessgod101), so you can get the books from there.

Hello Everyone,
These are some free resources, please see below:
https://www.chesspublishing.com/content/
https://www.365chess.com/opening.php
Best Regards.
Drat, didn't delete my comment about the fuddy duddys fast enough.
Yeah your comment on how all the octogenarians found this thread?