Codechef Problem Difficuly Rating vs Codeforces.

#	User	Rating
1	tourist	3985
2	jiangly	3885
3	jqdai0815	3682
4	Benq	3580
5	orzdevinwang	3526
6	ksun48	3506
7	ecnerwala	3505
8	Radewoosh	3457
9	Kevin114514	3377
10	gamegame	3374

#	User	Contrib.
1	cry	170
2	Um_nik	162
3	atcoder_official	161
4	-is-this-fft-	160
5	djm03178	157
6	Dominater069	156
7	maomao90	155
8	adamant	154
9	luogu_official	153
10	awoo	152

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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