Hint
The move equalizes the position.
Bigger hint
It's a seemingly crazy move.
Answer
44...be3!!
NikoTheodorou vs. royalfork56 | Analysis
It was a speed chess game that I just watched live. My brain told me black was toast but the eval bar said the position was equal. I couldn't believe it.
Black only had 11s and he must have decided it was hopeless so he resigned.
I'm only 1100 so can't really comprehend what they were thinking but that just seems like a crazy line to see. I would have resigned like black did lol.