Event: Division 3

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Opponent Rating Result
Graham J Gibson 1627 0 - 1
Andy While 1523 1 - 0
Nigel D Marshall 1433 1 - 0
Umut Senalp 1350 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1483 = (5933 + 400 * (2 - 2)) / 4)

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