nabla:
<b>nabla</b>: The absolute simplest way to calculate absolute winner.

x=0;
do
{
  maylose=false;
  y=0;
  while (y<players && maylose==false)
  {
    if x!=y
    {
      if player[x].points<player[y].points+player[y].notdone
        maylose=true;
    }
    y++;
  }
  x++
} while (x<players && maylose==true)
if maylose==false
{
  //player[x-1] is the winner
}

It works under the principle that if player x loses all his games and every other player wins all there games and he still beats them then he is definetly the winner.