He said he used lichess analysis board for cheating. That means he need not understand notation, as simply looking a the arrows pointing at the right squares would be enough.
According with the title of Blog an amusing definition of Statistics is the next:
It is the art of torture the numbers until they say what you want.
This blog by Toadofsky is one of the coolest things I have ever seen. And I don't even play chess. I just like math and cs. Great work.