Two Keys in One | Cast Key | Hanayama Key II

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Skip to Solution 1:57

Two Keys Puzzle

Music:
Attribution 4.0 International (CC BY 4.0)

[Internetedtv]

Amazing video!! This was the first puzzle I ever attempted. Such a fun solution, I remember smiling at every little stage of progress 😀 my friends always try to compete, who can solve the keys the fastest lol 😄

[davidcurran]

Thanks, now I can look smart in front of my grandkids. lol

[arthurneddysmith]

I've got one of these and it's made incorrectly. At 4:09, the part where you have to "flip it over, " one part is too big and so it cannot be flipped. I didn't want to look up the answer, so it took me a long time to work out what the issue was.

[RoderickEtheria]

Has Hanayama made sure there is only one solution to this puzzle? Or can the keys escape each other in more than one way, like they can in the Franklin's key puzzle? Key 1 looks like it's similar to the Franklin's keys and one key could probably extend over the blockage that is supposed to be on one of the ends of the closed key, where with the gap around the inside middle of the closed key, there is just enough space to fit it over the extension. I'm even more concerned with Key 2, where it looks like either the gap of one key could be placed so the key could either extend past the blockage of the closed key, or the gap could be positioned in such a way to go through the narrow area of the closed key's extension.


By the "extension", I mean the part at the far right of the LL of the closed key.