Chess Opening Theory is the No.1 topic of chess researchers. A great part of new chess publications are about opening systems, opening repertoires or just single opening lines.

The opening is the first part of their game learning players naturally want to improve, as they somehow have to start the game. And after some time they notice, that they are losing their games already in the opening.

What is modern chess opening theory?

  • Encyclopedia style books which treat all lines of an opening without verbal explications. Just lines and sub-lines and their evaluations
    An example is the Chess Informant Encyclopedia of Chess Openings ( 5 volumes )
    Chess Opening Theory Encyclopedia

  • Opening Theory Monographs about opening systems or opening lines. They offer normally also verbal explanations about strategic or tactical motifs or the historical background. Additionally they have often annotated model games about the opening line included.
    An example is Psakhis,L - The complete French
    Chess Opening Thery Monograph

  • Opening Theory Repertoire books which give the readers a clue how to select a repertoire from the mass of opening lines. Of course it would be ideal to know every line of your selected opening. But there is a memorization problem with that, as  a "complete" repertoire of an opening like the French Defence will be over 10.000 written pages. The whole Sicilian Defence will be maybe 50.000 written pages or more. Not many people are able to memorize all this and keep it up to date every day. Therefore players select an repertoire of lines which they want to play. This process is time consuming. Therefore repertoire books offer a solution of an leading expert of the opening and save the readers time.
    An example are Berg,E - The French Defence 1 - 3
    Chess Opening Theory Repertoire

  • Opening Theory articles in periodicals ( Chess Informant, New in Chess, ...) and chess magazines examine single lines of current opening theory fashion.

  • Chess Opening Databases and DVD are a mix of all book types above. They can be in Encyclopedia style, Monographs or Repertoire style. They cover normally more content, but are not as handy as books.
    Examples are the ChessBase products.

  • Chess Videos are a very good medium to teach. They normally cover less material.
    Examples are the ChessBase products.

With all that books, DVDs and videos a chess player who wants to improve his opening play, needs to know where to start.

Well, you will need

  • the best possible information sources available
  • understand what the authors there want to tell you
  • select your repertoire
  • memorize it
  • practice it in training and tournament games
  • analyze your results and identify possible weaknesses in your repertoire or errors in your memorization
  • improve your lines when necessary

That's a lot of work. Already the first step can be difficult.

What are the best information resources for your opening ?

How to get them and how much does this cost ?


There are 2 ways to optimize this process:

  • you can hire your personal chess trainer
    ( an expensive line )
  • use our site and our sister sites
    ( free to use)

Both options are viable. It all depends on your personal budget and your goals.

The advantage of our sites are these:

  • almost unlimted space to present all possible material
  • fast updates of new discoveries in chess opening theory for your lines
  • user input - your findings get published here and users share their knowledge
  • nothing gets lost in the cloud
  • free to use - no costs for basic usage of our services

.At we concentrate on the French Defence.

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You will find there all current Chess Opening Theory about the French Defence.

In encyclopedia style and additionally with verbal annotations on the detail pages of each line like in monograph style.

Our annotated games section will have all avaible model games about the French Defence mentioned in our Opening Theory section.

We will line out possible repertoires and publish updates as fast as possible.

Our users will work together and share their discoveries.

And you will have free access.

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