Brain cramp - ball hits b-r

[bellnier]

Sorry to bother you all, I know this is simple stuff but I've got a brain cramp - but here's my question: batter hits pitch, becomes batter-runner as she leaves batters box. Ball hits in front of plate but has wicked backspin and (IMO) b-r cannot avoid contacting ball as she heads to 1B...ball deflects off her left hip but stays in the playing field. Is b-r automatically out? Does blue have to determine intent? Can runners advance or immediate dead ball? Thanks so much.