Event: Tonbridge

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Opponent Rating Result
Timothy Gao 1481 0 - 1
Yevgeny Okun 0 ½ - ½
Yehen Gangoda Yapa 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

494 = (1481 + 400 * (1 - 1)) / 3)

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