I think I've had over 100, but in the game below I would have gotten over 100 if I had a chance to checkmate the last king. Or I could get pretty much infinite by just keep double checking without mating either opponent who only had kings left.
I only lost a pawn and a knight this game. Getting 2 queen promotions for free while the other players are fighting and then using those to pick up a lot of free material seemed like a good strategy.

is this enough? lol
My highest score without any double checks


Anyone scored over 100 yet? Screenshot for proof!