Event: Division 1

Opponent Rating Result
Philip Purcell 2100 0 - 1
Benjamin Larkin 2163 0 - 1
Danut Joian 1929 1 - 0
Bruce L Baer 2065 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2064 = (8257 + 400 * (2 - 2)) / 4)

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