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I can understand why different rating systems have come into existance. But why are they still in existance today?
Wouldn't it be a good idea to unify them? Is there any effort underway to do this?
Personally I'd be happy with standardisation on FIDE or USCF. I for one couldn't tell you whether a BCF of 101 was good or not without resorting to some algorythm or other. I think there's generally more awareness around FIDE and USCF and what those grades mean.
And please, lets NOT start to discuss CHESS.COM ratings and how they compare to the real world - this has been covered in another posting. I'm talking about OTB ratings in this case.
What do you think?
Pretty good idea, it is confusing i am currently rated 1737 USCF but have no idea what that compares to When it comes to BCF ratings.
Begin by dropping BCF ratings entirely ... do you know how they pronounce "lieutenant" in that country? But slightly more seriously, it doesn't help. Ratings localize no matter what system you use, so ELO in Ottawa won't equal ELO in Prague, nor even in Vancouver.
there's a conversion from bcf to uscf and fide, i don't know the formula, plus i think there was an issue with deflation for bcf ratings
there are conversions from fide to uscf for pairing purposes, also if you play in a FIDE tournament under the US flag these conversions are used. i don't recall the formula used. generally uscf is 50 to 100 pts. higher than fide rating but i know of some bemusing exceptions (i know of a 900 uscf player with an 1800 fide rating). these ratings really shouldn't be combined, they suit their purpose - they're for different pools of players. also uscf has rating floors, fide does not, so really old players sometimes get stuck at 2000 or 2200 whereas their fide drop a bit. uscf ratings are kind of weird at the low end too, with scholastic players often rated 100-1000.
actually i will get a fide rating in two weeks in an invite tourney, i have black against 5 players 2170+, if lightning strikes, its easy to see how inflated ratings are possible when establishing a rating.
If one more person uses the acronym BCF instead of ECF I'm going to go insane...
For quick reference:
USCF = ECF*8 + 600
FIDE = ECF*8 + 650.
Best of luck in your games Petrosianic - I came out of provisional fide at 1957 and my USCF is currently 1910. I guess my USCF is lagging my fide since I took a few years off and then started playing in Fide rated events.
Where did those formulae come from?
The ECF grading database:
It's not so much that the formulas are different, I'm sure if you took them mathematically, for example FIDE vs USCF would be very very little difference, lets say just a few points. This is also why conversions work in the first place, because formulas are roughly equivalent. So why are players in FIDE vs USCF in general 100 points different?
The difference is the pool of players, and that's why unifying ratings wont ever happen. Each pool (i.e. nation) will keep theirs as well as having an international, FIDE, rating. This is because not everyone wants to / or is able to play internationally to maintain an international pool which is the only way to "unify" ratings.
Now, something like changing the ECF to a 4 digit number so conversion is easier, I could see that maybe. But unification doesn't have as much to do with formulas as it does player pools.
Isn't a FIDE rating the only international rating one can have? USCF and BCF ratings are national ratings. And last time I checked there were a lot more nations than just those two.
In a practical sense, you only have an international rating if you regularly play internationally. If you go to a tournament in Seattle or Vancouver and come out with a FIDE rating, don't fool yourself into thinking you have an international rating.
I agree that it can be practical to have national ratings that at least work approximately like the FIDE ELO rating. That way, many could see easily that a 1100 tends to be among the weaker players in his club, a 1900 may be among the strongest players in his club, and a 2700 tends to be among the best players worldwide.
A few decades ago, chess in Germany changed from INGO rating to DWZ rating for such a reason, DWZ being very similar to FIDE ELO, USCF rating, etc. .
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