I am not very good at playing piano, though I do know how to read notes a bit and play chords.
I stumbled upon this chord, it's
and and then a bit like a fraction, one chord on top another:
Unsure what to do, I tried playing one chord with each hand (which sounds about right for the song), I asked a friend who I thought would know about this (professional and all), and he wasn't sure either.
There are a couple like this:
Some links to the piece: