List of confirmed cheaters

[DonaldKellett]

jhoffner I really don't want to publicly shame CW cheaters here but recently there seems to be an increase in the number of cheaters who aren't getting banned quick enough. Some cheaters have already lingered for months, wearing a 1 kyu/1 dan badge when they actually don't deserve it. If this doesn't stop quickly, the morale of genuine Codewarriors may be damaged and CW will gradually lose their trust. So, here is a list of confirmed cheaters:

- https://www.codewars.com/users/aditya7iyengar (edit: handled)

(List to be updated as more and more cheaters are discovered/confirmed)

┆Issue is synchronized with this Clickup by Unito

[jhoffner]

BTW we have a plagiarism service in the works. Its being built for Qualified but we will use it for CW to detect cheaters as well.

We also no longer allow banned users to delete their account or change their name. So any user who wants to use an identifiable name that means anything to them, once they get caught, they are stuck that way.

[kazk]

See, the main problem here is that some smarter people already know straight out copying is too blatant, so they are copying existing solutions with cosmetic changes, and the existing service is powerless in detecting this. Manual inspection is the only way to be sure

One approach that I've been (personally) looking into recently is to use sklearn to detect similar solutions. This works even if things are moved around and have some changes.

So I compared solutions for SKI kata by those two (by the way, you can run this on Codewars :)).

from sklearn.feature_extraction.text import TfidfVectorizer
from sklearn.metrics.pairwise import linear_kernel
v = TfidfVectorizer().fit_transform([xenoexploratorSKI, aditya7iyengarSKI])
print(linear_kernel(v[0:1], v).flatten())
# [ 1.          0.43158685]

I'd say that's already pretty high for advanced kata. And after removing comments, the similarity increases to 0.99867269. I'm still learning about it, but this seems useful even without specifying options like tokenizer.

[ejini6969]

Some Java cheaters now ~~

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52

[ejini6969]

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52