Event: GP4 - December

Opponent Rating Result
Steve Merchant 1523 0 - 1
Samuel Merchant 1550 0 - 1
Harry Morter 830 0 - 1
Mick Sullivan 839 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

986 = (4742 + 400 * (1 - 3)) / 4)

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