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Coffin's Improved Burr Puzzle (level 2-3)

Coffin's Improved Burr Puzzle (level 2-3)

thingiverse

Stewart T. Coffin's design no.36, known as "Coffin's Improved Burr (1979)," is a challenging level 2-3 puzzle that demands two shifts to remove the first piece and an additional three shifts to free the subsequent one. You can acquire individual pieces or print the entire set of six. An update from October 8, 2019, was made to enhance the sliding mechanism's performance.

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