Using game statistics to improve

I have a whole stack of blitz games I have been playing on playchess.com using the Fritz software. Some opening lines I play better than others, so it would be great to find some software that could analyse my opening lines, find the errors and point them out to me!

I am wondering what software will do this. For example, what would be really nice is if the software would give my grading strength based on each opening line I did.

I hope that makes. Sense. All advice welcomed.

Thanks,

Jon

I would value such software as well to know what openings I am most skilled at and what opening mistakes I have a proclivity to make.

Surely this must be one of the best ways to boost your grade, as all you are doing is pruning bad lines. Its low hanging fruit.