HexalabacusA bigger variant of Astrolabacus with six segments that but with six channels of beads.
Hungarian RingsGroup the four colours to solve. Alternative names: "Doublering" or "Zweiring"
Hungarian Rings QuadA generalized version of the Hungarian Rings created customly by the original inventor.
Infinity LoopA continous loop of 34 marbles, intersecting but split at the same time.
Inside Track 2Four intersecting circles plus one ring of marbles movable in more than one configuration.
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