Hole in my PocketRemoving one corner and tiles from a Rubik 2x2x2 pocket cube creates a basic moving hole puzzle with 2x2x2 mechanism retained.
IQubeA well-designed 3D movable space puzzle.
Igra Suvenir SharikiFive layers and four columns of marbles moved with the help of an additional single hole. Soviet version with a slightly different top.
Infinity Loop IINine pieces, one hole and a rotating circles that exchanges (and rotates !) dthe pieces.
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