Codechef Problem Difficuly Rating vs Codeforces.

#	User	Rating
1	tourist	4009
2	jiangly	3823
3	Benq	3738
4	Radewoosh	3633
5	jqdai0815	3620
6	orzdevinwang	3529
7	ecnerwala	3446
8	Um_nik	3396
9	ksun48	3390
10	gamegame	3386

#	User	Contrib.
1	cry	167
2	Um_nik	163
3	maomao90	162
3	atcoder_official	162
5	adamant	159
6	-is-this-fft-	158
7	awoo	157
8	TheScrasse	154
9	Dominater069	153
9	nor	153

Now, since Codechef has announced Integral Problem Difficulty ratings, I have some questions:

How is Problem Difficulty Rating calculated on Codechef?
(For instance, in Codeforces, it is calculated based on how many users were able to solve it in the contest.)

How does CodeChef Problem Difficulty Rating compare with Codeforces? What is approx mapping?
(Ex: What would be the difficulty rating of a problem on Codeforces, whose difficulty rating on CodeChef is 2441 ?)
(I guess that mapping may be like

Codeforces_Rating(x) == Codechef_Rating(x) — k

where k is like 200-300 or something. But I am not sure.)

What is the basic implication of Codechef rating?
(For instance, in Codeforces, Approximately this means that if the rating of the problem is equal to yours, then on a typical round you would solve the problem with a probability of 0.5.
Source : https://codeforces.net/blog/entry/62865 )

For Codeforces problem difficulty ratings, there are many blogs like https://codeforces.net/blog/entry/46304,
but there are none for CodeChef. That is why I resorted to asking about it here.

	Rev.	Lang.	By	When	Δ	Comment
	en1		nitin12384	2022-07-28 08:54:51	1309	Initial revision (published)

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nitin12384

2022-07-28 08:54:51

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Initial revision (published)

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