Event: MH Brown Summer League Section 2

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Opponent	Rating	Result
John Scotter	1537	½ - ½
Ronald Botham	1112	1 - 0
Colin W Field	1468	½ - ½

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

1506 = (4117 + 400 * (1 - 0)) / 3)