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A puzzle which looks like the wellknown moving-hole-puzzle-with-cylindrical-surface but has a mechanism which goes beyond that.
Blocked Barrel is a series of three puzzles which all look similar. They all have four columns which measure four marbles high.
All have non-obvious mechanisms which go beyond the standard puzzle known from Babylon-Tower and others.
The series consists of
Barrel Shuttle 11
Barrel Slide 121
Blocked Barrel 15
Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann.
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