The Wit's End Puzzle is a wonderful, classic disentanglement puzzle. Link to puzzle: http://bit.ly/2kzDUre
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Patent link: https://www.google.com/patents/US3387847

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I'm a Top-10 finisher in the US Puzzle Championship and just released a logic puzzle game on Steam! The game is called RYB: http://store.steampowered.com/app/547050

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