Event: IM Brown

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Opponent	Rating	Result
Gary Hinchcliffe	1828	0 - 1
Mark S Allison	1947	½ - ½
R Malcolm Hara	1635	½ - ½

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

1670 = (5410 + 400 * (0 - 1)) / 3)