Event: Wycombe & Hazlemere Club Championship

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Opponent	Rating	Result
John E Syner	162	0 - 1
Malcolm Instone	80	1 - 0
Steven Cox	152	0 - 1
Andrew W Hill	126	½ - ½

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

30 = (520 + 400 * (1 - 2)) / 4)