Just staying with this topic, does the MCO offer any theory concerning the openings, or does it simply give the opening lines. I'm guessing it doesn't simply because Icee wouldn't be having an issue getting through the book. That said, is there a solid book out there concerning opening theory? It's one thing to know the lines in an opening and another thing to know why the lines in an opening are played. Right now i have Seirawan's opening book which is ok, but i think it's a little dated (am i wrong here) and i feel i've reached a point where i want to take another step forward regarding the opening. Anyone?
how to read MCO-14

MCO does not have theory in it. (Well, ok, it has a couple of paragraphs before each opening.) It's basically a different version of the ECO you're probably familiar with. It is a reference guide, nothing more- to read it cover-to-cover would be a complete waste of time, and a massive one at that.

I second Gimly's question--what IS a good book on openings with theory?
http://www.chess.com/forum/view/chess-equipment/opinions-wanted-about-chess-opening-essentials-by-djuric-et-al
Admittedly the OP is asking a question, but the book is one of the best. To get properly comprehensive, however, you would need to buy a seperate book on each opening.

Take note, opening theory in chess means the body of moves known through being played or published as analysis. It doesn't mean, as one might naturally assume, ideas behind the opening moves.

I second Gimly's question--what IS a good book on openings with theory?
http://www.chess.com/forum/view/chess-equipment/opinions-wanted-about-chess-opening-essentials-by-djuric-et-al
Admittedly the OP is asking a question, but the book is one of the best. To get properly comprehensive, however, you would need to buy a seperate book on each opening.
I think the other book discussed in that link, the Watson books, are the answer -- There are three volumes and I don't pretend to have studied them closely (it's on my million year list of things to do, along with learning latin, and perfecting my breakshot in straight pool) but they really seem to fit the bill for books on opening that tell you more than just a bunch of variations and actually get into some of the larger thematic issues.

FWIW I think database software makes MCO type books obsolete. Those cross tables are tough to read. Using a (free!) database, I can generate a cross table that's easier to read, contains much more information, is assembled from data I can tweak and adjust to my own preferences, and that's clickable so i can follow the lines on an onscreen board. If I want to learn the best Caro Kann lines, let's say, I can filter for top players using that CK and see what lines they're playing. Using data that's from the past two or three years if I want to play only what's in fashion. I can upload fresh games from the web and the db utility can check those newly imported games for games which play lines in my "repertoire" which I should pay attention to. Meanwhile, printed books are getting stale from the day you buy one.
There's no doubt that a db can't do it all for you, there's still A LOT that a real GM or IM writing a book on a specific opening can tell you... but those big opening encyclopedia's are IMHO nothing but doorstops for anyone with a computer. If MCO was a stock, I'd be short selling it.

Take note, opening theory in chess means the body of moves known through being played or published as analysis. It doesn't mean, as one might naturally assume, ideas behind the opening moves.
Very important point! I would recommend finding an opening and then starting with the everyman chess series... they are usually pretty good in explaining the basics...

I second Gimly's question--what IS a good book on openings with theory?
http://www.chess.com/forum/view/chess-equipment/opinions-wanted-about-chess-opening-essentials-by-djuric-et-al
Admittedly the OP is asking a question, but the book is one of the best. To get properly comprehensive, however, you would need to buy a seperate book on each opening.
I think the other book discussed in that link, the Watson books, are the answer -- There are three volumes and I don't pretend to have studied them closely (it's on my million year list of things to do, along with learning latin, and perfecting my breakshot in straight pool) but they really seem to fit the bill for books on opening that tell you more than just a bunch of variations and actually get into some of the larger thematic issues.
Do people still play straight pool on the east coast(in sac town all they want to do is play god forsaken one pocket-i would rather watch paint dry.)
And I second the watson opening book recommendation.
Strangely I found the khalifman opening for anand series fantastically instructive as well.
I think the problem with opening books is they are only instructive if you look over the large tree find where you are confused and work through some of the issues the position is presenting and try and solve them WITHOUT help from other sources. Then it becomes a learning process which you can apply yourself as opposed to a big random set of moves. In anything you do always provide yourself with context.

I second Gimly's question--what IS a good book on openings with theory?
http://www.chess.com/forum/view/chess-equipment/opinions-wanted-about-chess-opening-essentials-by-djuric-et-al
Admittedly the OP is asking a question, but the book is one of the best. To get properly comprehensive, however, you would need to buy a seperate book on each opening.
I think the other book discussed in that link, the Watson books, are the answer -- There are three volumes and I don't pretend to have studied them closely (it's on my million year list of things to do, along with learning latin, and perfecting my breakshot in straight pool) but they really seem to fit the bill for books on opening that tell you more than just a bunch of variations and actually get into some of the larger thematic issues.
Do people still play straight pool on the east coast(in sac town all they want to do is play god forsaken one pocket-i would rather watch paint dry.)
And I second the watson opening book recommendation.
Strangely I found the khalifman opening for anand series fantastically instructive as well.
I think the problem with opening books is they are only instructive if you look over the large tree find where you are confused and work through some of the issues the position is presenting and try and solve them WITHOUT help from other sources. Then it becomes a learning process which you can apply yourself as opposed to a big random set of moves. In anything you do always provide yourself with context.
Yes they play a bit of straight pool on the east coast. Although 9 ball dominates all. (And 8 ball of course for the bar table crowd.) 1 pocket is a relatively recent vice, but it's growing. I agree that it's dreadful.
Andy Soltis' Pawn Structure Chess is IMO a very good book for openings, even though it's not about openings at all. But it's about pawn structures that arise from openings and it enables you to really connect the dots between seemingly different openings. For instance a Caro Kann has much more in common with Queen's Gambit games than it does with 1.e4 e5 games. Making use of the Soltis book, or any opening book requires quite a lot of study. IMO. You never "get it" the first time, you have to go back and forth back and forth between games and the book's lines and advice until things gel.

Hey man I noticed nobody answered your question and only talked about how the books explain the opening theory I love MCO because of the explanations it give on the purpose of the openings before the diagrams anyways by now you have probably figured it out but ill still say this for anyone else wondering
"KING'S GAMBIT
1e4 e5 2 f4 exf4 3Nf3 g5
_____________________________________________________
1 2 3 4 5 6
kieseritzky Philidor Hanstein Muzio
4 h4..................................Bc4(1)
g4 Bg7.....................g4
5 Ne5(a) h4..........0-0 0-0(t)
Nf6.........Bg7 d6 h6 h6 gxf3
6 d4(b) d4 Nxg4 d4 d4 Qf6
d6 Nf6(f) Nf6 d6 d6 Qf6 "
So the Line under the name are the first moves
The rows that have 4 5 6 ect are the most popular continuations of the opening so for instance after those first moves the most popular move is h4 the moves to the right of h4 are other variations so bc4 isnt the most popular but is still a noted variation. and the most popular move after h4 is g4 with another variation being bg7 then g4. whenever there are a line of periods between moves it means that after this move is played eventually this one should be. if you have any further questions please ask and ill be happy to answer have fun playing the kings gambit

If you're good enough to benefit from MCO, that is, if you are not a novice and are a competitive club player, then you are already good enough to get better books on the opening!
MCO has always filled a special place in the chess market place: it appeals to those players who don't need it!
NCO is so last century. MCO15 was about a decade ago. It no longer appears to be commercially worthwhile to publish new editions of such books.
FCO (dated 2009) is a somewhat different sort of book with text instead of tables of variations. I wonder if that sort of book is now also extinct.
https://web.archive.org/web/20140626173432/http://www.chesscafe.com/text/hansen128.pdf
http://www.jeremysilman.com/shop/pc/FCO-Fundamental-Chess-Openings-76p3561.htm
http://www.gambitbooks.com/pdfs/FCO_Fundamental_Chess_Openings.pdf

Hey man I noticed nobody answered your question and only talked about how the books explain the opening theory I love MCO because of the explanations it give on the purpose of the openings before the diagrams anyways by now you have probably figured it out but ill still say this for anyone else wondering
"KING'S GAMBIT
1e4 e5 2 f4 exf4 3Nf3 g5
_____________________________________________________
1 2 3 4 5 6
kieseritzky Philidor Hanstein Muzio
4 h4..................................Bc4(1)
g4 Bg7.....................g4
5 Ne5(a) h4..........0-0 0-0(t)
Nf6.........Bg7 d6 h6 h6 gxf3
6 d4(b) d4 Nxg4 d4 d4 Qf6
d6 Nf6(f) Nf6 d6 d6 Qf6 "
So the Line under the name are the first moves
The rows that have 4 5 6 ect are the most popular continuations of the opening so for instance after those first moves the most popular move is h4 the moves to the right of h4 are other variations so bc4 isnt the most popular but is still a noted variation. and the most popular move after h4 is g4 with another variation being bg7 then g4. whenever there are a line of periods between moves it means that after this move is played eventually this one should be. if you have any further questions please ask and ill be happy to answer have fun playing the kings gambit
Thanks for being the first person to answer this guy's question.
i went to the libaray to find a chess book and i found MCO-14 (Modern Chess Openings 14th Edition) by Nick de Firmian, but the only problem was i couldn't read it. i got confused, when it said
"KING'S GAMBIT
1e4 e5 2 f4 exf4 3Nf3 g5
_____________________________________________________
1 2 3 4 5 6
kieseritzky Philidor Hanstein Muzio
4 h4..................................Bc4(1)
g4 Bg7.....................g4
5 Ne5(a) h4..........0-0 0-0(t)
Nf6.........Bg7 d6 h6 h6 gxf3
6 d4(b) d4 Nxg4 d4 d4 Qf6
d6 Nf6(f) Nf6 d6 d6 Qf6 "
i don't get it, i understand Algebraic Notation but the way its writen i don't get. completly understand the first line under the title but after that im lost. Can some one explain it to me? plz i know its a good chess book because of the reviews and they wouldn't make 14 if they were not useful. i just need to know how to read it so i can read the next 734 pages. thx if you can help.