Adding sub-variations for common blunders

[nikhileshp]

I absolutely love the software for building repositories. I have been using it on my most common lines and have learned a lot with it. I would suggest adding a feature for common mistakes/blunders that people make.

This could be done by checking the most-played move and seeing if

• It would decrease the post-move engine evaluation by more than 30-40 centipawn loss in case of a mistake
• It would decrease the post-move engine evaluation by more than 75+ centipawn loss in case of a blunder.

Adding ? and ?? in the pgn files for these sidelines would be super helpful.

[Esnos33]

There are other sites you can already to that, like lichess or chesstempo, this app should concentrate on making best openig repertoir, lets no repeat work of others.