@Wolfram_EP said in #9:
> So white plays 1. Nf3, black responds 1... Nf6, and then white be like "wtf scam after my next move black can switch colors, what to play???" I like this :D
No.
You don't understand the rule.
In the first variant I described it goes:
The first player plays 1 Nf3, then the second player has two options 1) play as Black, after which he moves 1 .. Nf6 (or something else), or 2) play as white, after the first player (now Black) plays 1 .. Nf6 (or something else).
In the second variant I described, it goes:
The first player plays 1 Nf3 Nf6 2 d4, then the second player has two options 1) play as Black, after which he moves 2 .. e6 (or something else), or 2) play as white, after the first player (now Black) plays 2 .. e6 (or something else).
In either variant, the first player makes an odd number of plies (half-moves) after which the second player has the option to either play as Black (making it his move) or White (after which the first player, now Black, makes another ply). In either case, it's in the best interest of the first player to put an as equal position as possible on the board when the second player is offered a choice.