I would not trust the line vs 9 000 yugoslav with Bd4 in Correspondence Chess.
However this line vs  9 Bc4 Yugoslav looks reasonable at first sight.

Kerangali wrote on 10/06/22 at 09:08:04:


I think Chessable said that most of the money generated from the sales of courses goes to the author, so it is possible they have negotiated book rights as part of that?

I think there is also a practical element to this - once the course has been done, then the material is pretty much all there to be published as a book. There is no need to wait for an author to write it.

Also, doesn't Magnus's company own Chessable and several publishers which would again make the process much easier?

Possibly due to copyright laws, book editors seem able to exclude or control online courses made after books, while the opposite is not true. So the right order may be course first, then book.
Some people here have published Chessable courses. Does that include any restriction on books or other online publications based on said courses?