  The document tries to put focus on sequences with certain properties and
periods leading to the first value smaller than the starting value in the
Collatz problem. With the idea that, if all starting numbers lead ultimately to
a smaller number, all full sequences lead to 1 with a finite stopping time, the
problem could be reduced to more structured shorter sequences. It is shown that
this sequences exist and follow consistent rules. Potential features of an
infinite cycle, also leading to a smaller number, are also discussed.
