Re the close: If it was really a duplicate then why didn't Brian Towers♦ answer on the other post? Checkmate!
On Wiki, we have the List of youngest grandmasters since 1950. What about WCMs (woman candidate masters) instead of GMs?
follow-up questions to brian towers' answer in case they get deleted (I notice that on this stackexchange site, follow up questions or reasons for downvoting can be removed without warning or explanation!):
what is this database please? may you please share the database or how it was constructed or something here? chess.stackexchange.com/a/37013 i mean: did you really download all the stuff since 2001 and then combine all the data into 1 huge database? or what? or did you get it from somewhere or what?
as for re research effort: it seems the only way to do this is to get the database. so how? really downloading and combining everything? seems pretty long to do. i figured somehow there was something already constructed. if i do this from scratch, then i risk reinventing the wheel. am i wrong?
do we have the same 'procedure/algorithm' here chess.stackexchange.com/questions/36988/