Event: Croydon Shield

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Opponent Rating Result
James MG Toon 2055 1 - 0
Luke Hartley 1875 ½ - ½
Kenroy Smith 1792 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2174 = (5722 + 400 * (2 - 0)) / 3)

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