[Retros] Latest trend

[Martin Skjöldebrand]

Hi,

I'm preparing a small summer talk for our chess club - basically an 
introduction to Retrograde analysis with a few very easy examples.

I'm not very active here, but I really enjoy the retro-genre of 
problems. But I'm confused as to what are the latest trends of 
retro-problems? What type of problems are you most likely to find in 
recent examples?


Regards,

Martin S