We now know some of the quarterfinalists. Here's what to think about when you're predicting:
Knockout games: Guess each team's score in the match, just like in the group stage. You can guess a drawn scoreline if you want to.
4 points maximum for a correct prediction
Most matches will probably be decided in the normal 90 minutes, but the points are generous if the game goes to extra time. A correct guess after 90 minutes will be rewarded. Equally, so will a correct guess after 120 minutes, if the score changes during extra time. But penalty shootouts don't count. Not in this game.
Acquire points if you correctly predict:
 a
result after 90 mins or after 120 mins (1 point max)

goal difference after 90 mins or 120 mins (1 point max)
 a
team's score after 90 mins or 120 mins (1 point max per team)
It's to try and keep it interesting and fair  and not totally ignore extra time, as it can be the best bit
In the event of an extratime victory, both a draw and a win would count as correct 'result' predictions. (A draw was true after 90 mins, but the winner was decided in 120 mins.)
E.g. If you predicted FRANCE 21 GERMANY and the match ended 11, then 22 AET, you would get 1 point for Germany's score (90 mins), and 1 point for France's score (AET), but nothing for the result or goal difference. Guesses of 11 or 22 would both get the maximum 4 points.