OptiMAL
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In other words, it will be like this: The "Parties" will be called "Tournaments" and will be calculated as the sum of the ratings of all players in the tournament, which they HAD AT ITS END, and then this number is divided by the number of participants. THIS IS THE SAME THING!!
Parties aka Tournaments = Rold1/n
Where Rold1 = the sum of all Rold of the players in the tournament
n = the number of participants
I think we can agree on this?:)
:D