https://www.youtube.com/watch?v=e95SLI3fcgk
Why does open with 1.e4 or 1.Nf3
With Nf3, you can nearly always set up a true KIA. With e4, you can run into d5 (center-counter/Scandanavian) and then you must play something else. If you already play e4, you can add the KIA to your repertoire. If you play Nf3, you are more likely to play the KIA against everything. (Though you don't have to.)
i play 1.Nf3, but only about a quarter of the time does it transpose to KIA.
i believe the answer you are looking for (or close to it) is this: 1.e4 and 1.Nf3 can transpose to the same lines. playing the KIA you are basically looking at establishing this position:
if you notice, the knight is on f3 and the pawn is on e4. these are there to influence the center, considered the sweet spot. at this point, the pawn and knight are influencing the d5,e5, f5, g5, and d4 squares. as a true beginner, you will probably want to get a good book to explain the opening. one good book that i started with is "Winning Chess Openings" by GM Yasser Seirawan. it does a great job of explaining the position and the reasoning for each move.
Why does KIA open with 1.e4 or 1.Nf3? I'm a brutally novice chess-player and I've just adopted KIA as my weapon of choice. Its new to me.
Why is there two dif. games? I see they meet up later if black doesn't interfere. But why the choice?