[boomboomsubban]

Even more details, like how Queen Isabella may have inspired the change and that it was common to declare the queen in "check" for quite some time. https://en.wikipedia.org/wiki/Queen_(chess)#History

[dvirsky]

> ... the ability of pawns to be queened was restricted while the original queen was still on the board, so as not to cause scandal by providing the king with more than one queen.

This is awesome :)