It promotes your pawn into a queen automatically instead of you being able to choose what piece you would like to promote to.
What's the auto-queen setting do?

It promotes your pawn into a queen automatically instead of you being able to choose what piece you would like to promote to.
Oh cool. Seems useful for time. Thanks!
In some occasions you need to underpromote to prevent a stalemate because of the auto queen enabled and it is good to disable it.

In some occasions you need to underpromote to prevent a stalemate because of the auto queen enabled and it is good to disable it.
I'd agree in longer times like rapid and longer blitz.
For bullet and low blitz time controls, auto-queen would probably help you win more games than lose.



In theory you might want to under-promote. We can construct situations where it's useful or even necessary to change the outcome of a match. That's what the rule is for, but I'm wondering how often you actually need to do that. 1 in a 10,000 matches? 1 in a million? 1 in a billion matches? Are there easily engineered patterns which a losing player would otherwise use to force a stalemate or is this just a bizarre rule which is of very little practical importance?
Same as title. Thanks!