49ers can’t lose again – it’s just math

Win or go home. It’s that simple after the 49ers 34-24 loss to Buffalo. Don’t buy it? Check with the coach. “We’ve got four more games . . . and we’ve got to win all of them,” said Kyle Shanahan. You know the calculation. The Niners were 5-6 coming into Monday night’s nationally televised game. Ten wins is a perfectly acceptable total for an invitation to the playoffs. To get…