The amount of variation might be large or small - it is the system involved is so impossibly complex to deal with practically].
Put in these terms, it all is beginning to make perfect sense. Practically speaking, I mean. Things are just so impossibly complex. Leave true thinking for those so equipped.
every single legal game of chess (to be precise, an infinite number of branches for each of them)
uhh, wrongoloid. u have "ervis precisely" (20) moves on move one for white. and black has a finite # of responses. and short draws are legal games.