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Chess CAPTCHA

en.lichess.org

151–160 of 171 posts

Re: Chess CAPTCHA

#151
post #43

Brilliant building of software. Less than brilliant copy. I would change Black plays; checkmate in one! This is a chess CAPTCHA. Click on the board to make your move, and prove you are human. to This is a chess CAPTCHA... To prove that you are human, click on a black piece, then click on the only destination square that will checkmate. I really don't mean to nitpick, but took me a minute to figure out what to do. Som…

[deleted]

Re: Chess CAPTCHA

#152
Seeing that computers have already surpassed human in ability to play chess, what makes you think that this CAPTCHA isn't just easier than morphed text CAPTCHAs.

Re: Chess CAPTCHA

#153
post #45

I am fairly certain it would be quicker to program a computer that can brute force a checkmate in one than I can solve these things by hand. You have what, 11 pieces, they can move into 64 positions each (at most, much less in reality). That means a computer must brute force 64*11 = 704 attempts. In other words, no time at all to bruteforce this once you've read the grid. Reading the grid in itself is rather trivial…

Yes, an afternoon of coding to be able to post spam on exactly one website. Until they change the captcha.

So you are, literally, arguing for security by obscurity. "Oh, my captcha is unique, therefore nobody will bother".

There are easier to implement unique captchas, than chess.

Re: Chess CAPTCHA

#154
post #44

Earlier quoted context omitted.

thanks for the feedback, I will apply the suggested change soon.

Ignore the feedback. Original copy is better. It is interesting because you can't really A/B test the response time with the different text, since the response time includes the human processing time of the chess problem.

I would just recommend clarifying "click" to "click on the piece to move and the destination square" or something to that effect.

Re: Chess CAPTCHA

#155
post #43

Brilliant building of software. Less than brilliant copy. I would change Black plays; checkmate in one! This is a chess CAPTCHA. Click on the board to make your move, and prove you are human. to This is a chess CAPTCHA... To prove that you are human, click on a black piece, then click on the only destination square that will checkmate. I really don't mean to nitpick, but took me a minute to figure out what to do. Som…

While I think both version of the text would work, I think it's worthwhile to go over some reasons why the suggestion could actually be less clear than the original.

1) The two most important pieces of information (player color and goal) became separated from each other;

2) The third piece of information (number of moves) went missing;

3) The player's color became hidden in the middle of the paragraph instead of the first word;

4) The player's goal disappeared to the end of the paragraph, instead of in the first sentence after player color;

5) The original has a clear and unambiguous goal for both new and regular users, while the alternative became very verbose, especially for returning users.

6) Usability is about the target audience, and the target audience is chess players, not software developers.

7) In contrast to how the founders want to position the brand, a very watered down, a newbie-friendly CAPTCHA could alienate experts from the site, and an expert-friendly CAPTCHA could alienate beginners.

To the OP: Since you have an established chess community, you should be asking them if they have a strong opinion rather than blindly taking advice from Hacker News :)

Re: Chess CAPTCHA

#156
post #151
post #43

Brilliant building of software. Less than brilliant copy. I would change Black plays; checkmate in one! This is a chess CAPTCHA. Click on the board to make your move, and prove you are human. to This is a chess CAPTCHA... To prove that you are human, click on a black piece, then click on the only destination square that will checkmate. I really don't mean to nitpick, but took me a minute to figure out what to do. Som…

[deleted]

I, too, prefer the first version, mostly because of the suspension (...)

Re: Chess CAPTCHA

#157
CAPTCHAs are an interesting example of software that actually gets worse the more people are using it. Making fun and unique CAPTCHAs for large sites might be a good business for programmers that aren't interested in the winner-take-all pressures of normal software.

Re: Chess CAPTCHA

#159
This is probably easier for a computer to crack than a well-built traditional CAPTCHA. Recognizing a pre-defined small set of images (the chess pieces) and performing a search for the winning move seems much easier than beating the image distortions in CAPTCHAs with OCR modifications.

Re: Chess CAPTCHA

#160

Earlier quoted context omitted.

You are right, of course, and I knew I was going to regret the use of even the toned-down term "probably normal-ish". The question is whether the one can meaningfully ask which text is faster to parse, despite the "noise" the comes from the time to actually perform the chess move. I suspect the answer will be 'yes'.

I think the answer will be 'no' as solving a chess problem is a learned skill and not as innate as reading and understanding text and the time delta of comprehension between two similar text passages << time to solve chess problem distributed between users of low and high skill.

Why would the distribution of user skill differ across test groups? There's no reason it should. The expected time to solve the puzzle itself would be the same across both groups.
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