Event: Division 3

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Opponent Rating Result
David Smith 1158 1 - 0
David Jarvis 1499 ½ - ½
Alain Chandler-Hurst 1200 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1552 = (3857 + 400 * (2 - 0)) / 3)

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