Will you solve one of the world's most difficult and mysterious puzzles? Introducing Cicada 3301
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Will you solve one of the world's most difficult and mysterious puzzles? Introducing Cicada 3301

Do you fancy yourself as a puzzle solver? Here's your chance to try your hand at one of the internet's most difficult unsolved puzzles and join a mysterious top-secret club. Three puzzles were set, but one remains unsolved.