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May 10, 2019 at 16:04 comment added Michael @PeterLeFanuLumsdaine, done.
May 10, 2019 at 16:04 history edited Michael CC BY-SA 4.0
Replaced a dead link with a live one and added a pic from it.
May 10, 2019 at 9:37 comment added Peter LeFanu Lumsdaine Unfortunately the image link is dead. Can someone who knows this exercise find another image, and/or put a sufficient description into the text?
Jan 7, 2014 at 3:35 comment added Steven Gubkin One of my favorite games to show students of all ages. I have never met an elementary schooler who can do it. Some bright middle schoolers can. High school and up it pretty much divides into who thinks about it, and who just wants to have fun getting more and more tangled. Really a marvelous puzzle, and (in my opinion) the basic topological insight needed before the more rigid geometry of tavern puzzles.
S Jan 6, 2014 at 23:37 history answered Michael CC BY-SA 3.0
S Jan 6, 2014 at 23:37 history made wiki Post Made Community Wiki by Michael