I see your point, but I believe it would be exceptionally useful for training, both for newbies and professional that want personalized lessons. I suggest the

I see your point, but I believe it would be exceptionally useful for training, both for newbies and professional that want personalized lessons. I suggest the author try to experiment with adding some extra features allowing chess teachers to draw moves on canvas (arrows showing piece movements, highlighting cells via keyboard combos, drawing by hand, etc.)