16 v 10 is so close that one or two cards can make a difference. Just take the count of the cards played and if the count is positive stand or if its 0 or - hit. 12v4 is also pretty close. Scan the table quick. If a lot of lows and 7,8 and 9s have been played stand, If you don't see many lows or 7,8 or 9's hit.