Kornet was a -2… 
Okay I am begging people. PLEASE stop quoting single-game +/- as if it means anything. It doesn't. It is irrelevant. It only becomes useful in much larger samples, and personally I don't like it even then, but at least it's better than single-game.
I don't agree that +/- is a bad or irrelevant stat, even one game. The +/- from that one game may not tell you much about the player overall but it does tell you something about that player in that game. It is not the end all, but it is representative of what that player did in that game to contribute to winning. It is one of many things that should be looked at.
In this game, Kornet was -2, Pritchard was -3, and Hauser was -8. Those stats all mean something (about this game), not everything, but something.
No matter how you slice it though, Kornet stepped in and played a key role in a win. 20 pts, 8 rebs, and down the stretch, he was involved in several of the game deciding plays. He was good. The -2 is real though. You could dissect that and see what happened but in a close game, -2 is not that far off the norm. It is what Kornet is. A flawed but useful player who is more important than a lot seem to give him credit for. And he showed all of that in this game.