Event: Division 1

Opponent Rating Result
David C Okike 2210 ½ - ½
Robert S Eames 2186 1 - 0
Martin Smith 2161 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2186 = (6557 + 400 * (1 - 1)) / 3)

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