Really, none of the circuits shown would be called "a chaser". They are sequential flashers, which are a fundamentally different animal.

 

please elaborate - what is so fundamentally different?

 

Based on the recent thread discussing actual "light chasers", the difference is in the number of lights on at the same time. IN EVERY INSTANCE of chasers that I have seen, that has been the case.
Evidently the reference quoted in post #82 uses a different definition.

 

i am just trying to understand what you consider chaser. because one can connect more LEDs...

so if i understand correctly, if circuit has N outputs (channels), and only one of N lights is on, this is not a chaser. but if we connect more lights (such as 2N, 3N etc.) then 2 or 3 lights will be on at the same time and therefore now it is called a chaser?

or that is still not a chaser because only one of lights is on (out of N channels)? say if we have 8 channels but pattern is something else like 00101110 that keeps shifting/rolling, this makes it a chaser?