Event: St Andrews Club Knockout Tournament

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Opponent	Rating	Result
Robin A Edwards	120	½ - ½
Robin A Edwards	120	½ - ½
Stephen Crow	150	½ - ½
Stephen Crow	150	1 - 0
Michael A Pollard	129

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

235 = (540 + 400 * (1 - 0)) / 4)