The Cast ABC puzzle from Hanyama is based on a design from over 100 years ago.
The aim is to try and remove the 'C' piece from the other 'AB' piece. If you go the wrong way though you'll hit a dead end.
Ranked as a 1 out of 6 stars by Hanay...
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The puzzles are fabulous. You think they are going to be quite easy but they turn out to be quite tricky , you have to think how the puzzle eorks , then you get it.