Event: St Andrews Club Championship

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Opponent	Rating	Result
Bryan Wilson	101	½ - ½
Andrew D Bettley	148	0 - 1
David P Thrun	97	1 - 0
Edward Stamp	94	0 - 1
Peter Morgan	47	1 - 0(def)

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

10 = (440 + 400 * (1 - 2)) / 4)