Earlier quoted context omitted.
Any move is legal in casual play if the person on the other side of the board agrees that is is OK, especially if that game is held in their own house. I mean: We're not playing ranked games here. It's supposed to be fun, and it was a fun game. Self eliminator chess sounds like an interesting dynamic. I'll have to check it out. Some of the games where my thinking feels best (if that makes sense) are the games where a…
Point taken, rules are as agreed between players, not divinely imposed. I was just curious about P-to-P promotion legality per the 'standard' I hope SE chess lives up to its promise! It felt right and somehow freeing not to be always hemmed in by your own pieces.
If chess is a war simulation, then: It seems like it is both brutal and useful to deliberately destroy one's own units.
(It's bad PR, always, but I'm both the PR department and the native public audience. It'll be fine on my side of the board, and it might even frighten the enemy.)