Solving Fossil's ASCII art CAPTCHA in 171 characters
SMRTR summary
A programmer discovered Fossil SCM's ASCII art CAPTCHA system that displays hex digits using unicode block characters and successfully created a solver in just 171 characters of Python code. Through code golfing techniques, they reduced the original solution from analyzing all seven rows of each digit's bitmap to using only two strategic rows, employing mathematical tricks like XOR operations and modulus calculations to compress the lookup table from 43 to 21 characters.
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