User blog comment:Monster Pumpkin/Saving the Russian Royal Family?/@comment-32656-20120217021442/@comment-1310192-20120217031256

Though had the Tsar be saved the Whites would've likely won due to momentum, as LG said-the shooting of the Romanovs kinds ended around half of the White Army's fighting reasons.

I believe the most likely is a constitutional monarchy led by Kerensky as Prime Minister, and, as LG said, more of a fragmentation of Russia.