Event: MKO

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Opponent	Rating	Result
David O Vaughan	1823	0 - 1
Tiiu Loog	1662	1 - 0
Richard Garrett	1998	0 - 1

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

1694 = (5483 + 400 * (1 - 2)) / 3)