This post ends with a situation in a real tournament game where a bishop promotion is the only winning move
https://timkr.home.xs4all.nl/chess2/minor.htm
Well, maybe. There's no full record of the game, it's not even clear which year it supposedly took place in. It could have been a real tournament game, but I don't think there's enough evidence to reasonably conclude that it was.
Well, maybe. There's no full record of the game, it's not even clear which year it supposedly took place in. It could have been a real tournament game, but I don't think there's enough evidence to reasonably conclude that it was.