zippyman55 8 hours ago

There are lots of situations where a promotion to a queen would result in stalemate (draw) so a promotion to rook or other piece gets away form this. I'd say Rook would be most common, but some special (problem?) positions a knight or bishop could solve the problem with a mate or a nice fork. E.g. promote to a night with check and an attack on the opponents queen.

AtlasBarfed 9 hours ago

There are chess puzzlers I've seen where promoting to something besides a queen is necessary to prevent stalemate.