Clarification of biwire, biwire shotgun, etc.....

After reading other posts on this topic I am still confused about all the definitions. Here's my understanding:

single-wire: one cable to each speaker, for each cable - two connects at amp side, two connects at speaker side.

single-wire shotgun: two cables to each speaker, for each cable - one connect at amp side, one connect at speaker side

bi-wire: two cables to each speaker, for each cable - one connect at amp side, two connects at speaker side.

bi-wire internal: same as bi-wire, but the two cables are combined to look like one cable.

bi-wire shotgun: four cables to each speaker, for each cable - one connect at amp side, one connect at speaker side

Pls. correct me if the above is incorrect. If my assumption is right, then isn't single wire shotgun identical to bi-wire (in terms of total gauge) except that the speaker side are further split? Along the same line, isn't an internal biwire identical to single-wire except that the speaker side are further split?

I would appreciate any clarification and if anyone knows of where I could find "graphical representations" (ie. diagrams) that show exactly how each scenario is like.