Opening lines learning mode

[anthonyivol]

Hi !
I was thinking about a learning mode for openings. The mode would kind of look like tactics with some changes :
Given a board from the 2nd to the let's say 10th move (and maybe an opening variation name) the user has to find one of the possible "book" move. He also could chose a specific opening (like tactics themes) for hard training.
The mode could also include opening traps moves. And maybe a rating ?

Would it be hard to implement ?

Thanks for reading, suggestions and opinions are welcome !

[anthonyivol]

Related to this : #8118