Event: U1850

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Opponent	Rating	Result
Chris Jardine	1803	½ - ½
Peter Jenner	1639	½ - ½
Russ Hayley	1691	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1844 = (5133 + 400 * (1 - 0)) / 3)