FAQs

Do I need to install anything on my computer to be able to use this service?
What content can I access as a non-registered user (guest)?
What do I get if I register?
What do I get if I subscribe to your service?
On how many computers can I use my account?
How can I protect from an unauthorized usage of my user account?
Why is some content unavailable to me in the table view with opening lines/articles?
How often is the chess content updated?
Can I export content from opening lines/articles to PGN/CBH format?
Which games are in CHOPIN database?
Can I run a chess engine from within CHOPIN interface?
Why don’t you use ECO Code System?
How can I find a particular line if I only know the moves which lead to a desired position?
What is the difference between “book” and “feather” tab views?
Why is only the main line and one move of each subvariation shown in the opening lines and articles?
What are the “plus” and “down arrow” signs used for in “book” and “feather” tabs?
In what way are the transpositions shown?
What is the “Diagrams” view used for in “book” and “feather” tabs?

Do I need to install anything on my computer to be able to use this service?
No, it’s enough to type www.chessopenings24-7.com in one of standard Internet browsers like Firefox, Chrome or Safari (Internet Explorer also works but significantly slower with our web application) and you’ll have access to all available features. Some of the content though will be available according to your user status.

What content can I access as a non-registered user (guest)?
Non-registered users have access to one complete opening line, one article from “Opening Surveys” column and one article from Boris Avrukh’s “Pick of the Week” column.

What do I get if I register?
Registered users have access to content of five complete opening lines, three articles from “Opening Surveys” column and two articles from Boris Avrukh’s “Pick of the Week” column. In addition, you’ll be able to follow our announcements of new content and functionalities through available channels of communication.

What do I get if I subscribe to your service?
Subscription will enable you to have an unlimited access to content from categories according to the type of your subscription. If you’d like to compare different types of subscription and their benefits please see our Subscription Table.

On how many computers can I use my account?
Your user account can be used from any PC or mobile device as long as they can run one of supported browsers and have active Internet connection. You can be logged in at www.chessopenings24-7.com with only one device at the time.

How can I protect from an unauthorized usage of my user account?
The best advice is to keep your password safe and to change it regularly (for instance once a month). If someone unauthorized has got and changed your password please contact our Technical Support Team and they will assist you in resolving this matter.

Why is some content unavailable to me in the table view with opening lines/articles?
Content which is not included with your current type of subscription are ghosted in a table and can’t be accessed. Please check what is available to you according to your type of subscription in our Subscription Table.

How often is the chess content updated?
Our content is updated in accordance with the following publishing dynamics:
Mondays-Saturdays: New Update of Opening Line
Sundays: New Opening Survey

Can I export content from opening lines/articles to PGN/CBH format?
Opening lines and articles can be dowloaded in PGN format by clicking on PGN tab, which is located just above chess viewer. Also, moves that are explored in “Tree” tab or games that you get as a response from “Tree” tab can be exported to PGN; this option is available in the text field below the chess board in “Tree” tab.

Which games are in CHOPIN database?
CHOPIN database contains over 100,000 theoretically relevant games and this selection is based on game fragments quoted in our opening lines and articles; this database is constantly being updated with weekly additions. Over 90,000 of these games were played between opponents whose average rating was 2600 or more. In addition to top over-the-board games this database contains engine and correspondence games.

Can I run a chess engine from within CHOPIN interface?
This option is not supported in our user interface since our GMs have already analyzed and evaluated all available variations (see what our editors say about that in Editor’s Word column). If you still need chess engine assistance in any given active position then switch to our “tree” tab and export string of moves in the text field below the chess board into a PGN file; this file can now be opened in another chess engine GUI.

Why don’t you use ECO Code System?
Original version of the ECO Code System has been conceived around 45 years ago and in spite of all improvements through the years it kept an unbalanced distribution of games in opening lines. Our classification system is made to fit the current state of chess theory and practice (see what its author and architect GM Bojan Vučković says in Editor’s Word column) and with every CO 24/7 code you’ll see a corresponding code (or codes) in the ECO Code System for our users convenience.

How can I find a particular line if I only know the moves which lead to a desired position?
CO 24/7 Opening Key can be accessed through “Key” tab. By choosing particular moves you reach a desired position and then you click on the link which takes you to the content of the corresponding opening line.

What is the difference between “book” and “feather” tab views?
In our “book” tab you can see opening lines from 001 to 500, which covers complete openings theory while “feather” tab shows theoretical articles, which focus in detail on a narrow theoretically significant area. See what our Editor-in-Chief GM Boris Avrukh says about that in Editor’s Word column.

Why is only the main line and one move of each subvariation shown in the opening lines and articles?
Chess content in CHOPIN lines and articles always follow the same pattern: the best continuation is always the main line (according to our editors) and other moves leading to subvariations are listed in descending order. These moves are followed by our editors evaluation for quick reference and easier navigation through the opening analyses. Available options like Expand All/Collapse All and Hide All/Show All are used for quick adaptation of display to user’s convenience.

What are the “plus” and “down arrow” signs used for in “book” and “feather” tabs?
Clicking on “plus” sign will display the rest of analyzed variation and the alternating “minus” sign will close it again. “Down arrow” sign will show the final text commentary for a given variation (if it is available); alternating “Up arrow” will hide the displayed commentary.

In what way are the transpositions shown?
If there are multiple ways to reach a position (through various move orders) then its analysis proceeds only in one spot and in all other places there will be hyperlinks pointing at the main move order.

What is the “Diagrams” view used for in “book” and “feather” tabs?
Content in “book” and “feather” tabs consists of text and diagrams which denotify chapters and the most important positions. When you select “Diagrams” from the option bar, Summary table will change to a string of diagrams which represent chapters in the active line/article; clicking on a diagram will take you to the diagrammed position.

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