Found this from Nev's original post.
Scoring
For the group stages:
The point scoring system is exactly the same as it is for the league games. There is no difference.
You are predicting the result at the end of 90 minutes. In the case of replays this is still the case. Extra time and penalties are disregarded.
Correctly guessing the score: 3 points
Correctly guessing the result: 1 point
Predictions will be for all Cup games played from the start of the game. If any 2nd round replays happen to take place on the 3rd round weekend then these games will count. If any 4th round replays are still to play after the cut off point for the end of the group stage (the end of Wednesday before the 5th round ties) then that replay will form part of the 5th round predictions. This will apply to each round of the game.
In the event of a tie then the player who is closest to predicting (with their original predictions) the total number of goals scored across every game will qualify.
In the event of it still being a tie then the person ahead at the previous points update will qualify. If this is still level then lots will be drawn.
For the knockout stages:
The point scoring system will remain the same, with results counting at the end of 90 minutes. However, in the event of a tie the first tie-break will be to extend all replays to include extra time (using the original predictions) to see if this produces a clear winner. In the event of this happening then players who predicted a draw at the end of 90 minutes could lose points for the tie-break if a team wins in extra time. Penalties will not count towards the prediction game.
If the game is still tied after this then the tie breaks revert to the same order as the group stages.
For the Final
Again the prediction is for 90 minutes. If there is a clear prediction winner after 90 minutes (even if the real final is tied after 90 minutes) then the prediction competition is over and we have a champion.
The scoring and tie breakers will be exactly the same, with the exception that there will be no drawing of lots. Finalists will be asked to predict the time of the first goal (including the possibility of predicting no first goal) - to be used only in the event of both predicting the same score/result. Finalists can predict the same score if they want but cannot predict the same time for the first goal. The second prediction must be different in that respect only.