I have thought about adapting Simon Tatham's puzzle collection to a captcha. Like it just gives you a puzzle with no instructions.
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Where in the world is Carmen Sandiego!
You catch the culprit of the current case, using the clues and your geographic knowledge and Encyclopedia!
Where in the world is Carmen Sandiego!
You catch the culprit of the current case, using the clues and your geographic knowledge and Encyclopedia!
