To make sure that robots aren’t posting messages
"Click on the board to make your move, and prove you are human"
Stockfish:
Stockfish:
To prove that we are humans.
Like @ReallyClueless said, it's to prevent bots to post ads and spam messages. It's similar to when sites ask you to select all squares that contain a certain image.
i personally don't, i use a bot combined with stockfish to do it for me
It's mainly to increase the amount of time required for a post. In addition, the CAPTCHA offers an opportunity to avoid sending a message full of strong emotion by making you think about what the post will accomplish. I think this post will accomplish something.
Finally, the CAPTCHA encourages longer posts and prevents spam.
Finally, the CAPTCHA encourages longer posts and prevents spam.
me:is about to post in this topic. Chess CAPTCHA:Qxf7 #The most common answer
You can also just get the answer
<Comment deleted by user>
To allow even bad players like myself to checkmate once in a while.
That being said, I've just looked at it and the way it is implemented suggests, that this isn't a measure against spam-bots so much as a measure to make people think at least 1 second before they post. Technically it isn't a ""Completely Automated Public Turing test to tell Computers and Humans Apart" (CAPTCHA), because all necessary information lays there, nicely structured, to be picked up by an engine.
That being said, I've just looked at it and the way it is implemented suggests, that this isn't a measure against spam-bots so much as a measure to make people think at least 1 second before they post. Technically it isn't a ""Completely Automated Public Turing test to tell Computers and Humans Apart" (CAPTCHA), because all necessary information lays there, nicely structured, to be picked up by an engine.
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