CAPTCHAs – the questions that a website asks you to answer to prove if you’re a human being or not – come in many shapes and forms.
Although they most commonly ask you to decipher some words hidden in a distorted graphic, there are more elaborate versions which can ask you to solve some complicated mathematical calculation or ask you to add toppings to a pizza in an attempt to stop automated bots leaving spammy messages.
As a keen chess player, I was interested to see this CAPTCHA being used on an online chess forum…
Read more in my article on the Naked Security website.
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