<FIDE ID and Country Codes>
Has anybody else worked with these?
In particular, I’ve continued the work following the lead of OlimpBase and Mark Weeks:
I’ve expanded Weeks work on decoding the FIDE ID. Realizing that the FIDE ID is uniquely given to a player for their entire life(*) allows an interesting analysis of migration patterns of chess players. That is because the FIDE ID gives the location of the player’s first chess federation, while the FIDE nationality gives the location their current federation.
I’ll have more to say about that later, but I have discovered a few anomalies.
E.g. there is a 9 year old CM (i.e. rating >2200) from the Bhahamas, Nathan Smith:
His FIDE ID is 61400220. A simple explanation is that the ID is a combination of Federation identifier + player identifier:
Where nnnnn is a 5-digit number, and CCC is a 1-3 digit Federation identifier. The CCC is often called a country code, but I believe it really just identifies a Federation within a country.
Or, perhaps it’s redundant, since some countries can have several CCC numbers, e.g. Turkey, Germany, USA, Russian, France, Spain, etc. It appears that the nnnnn part of the identifier is deliberately kept less than 10000, and so always leads with at least one zero.
I’ve given this long-winded intro because Nathan Smith’s FIDE ID has a country code of 614. What is puzzling is that Smith is the only FIDE player (out of 445013) with this country code.
There are about a dozen players in a similar situation (one player/one country code). Does anybody have any idea what is going on?
(I’ll eventually post a detailed explanation in my blog – but I ask here because someone might already know what I’m talking about and have the answer).
(*) FIDE ID’s do sometimes change for a player. This I learned from studying Rating charts of certain players on OlimpBase. I’ll come back later, hopefully, and give an example or two.