I know this will probably be laughed at but it has been fairly accurate over many years. I stopped gambling for a number of years but over a 29 year period it only was wrong twice on the side. The score was always strange and only hit once exactly as I remember but the totals were relatively accurate but I didn't follow. It is a mathematical formula passed on yards for, against and points for, against. I didn't develop it; I read it in a book on gambling; it was called Dudley.
Here are the numbers this year: Option 1: KC 18, SF 17; Option 2: SF 23, KC 22. Both say KC/under
My pick is SF 21 KC 20