Event: St Andrews Club Championship

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Opponent	Rating	Result
Giles Dunn	1638	1 - 0
Ian Scott	1610	½ - ½
Lester Jones	1531	1 - 0

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

1860 = (4779 + 400 * (2 - 0)) / 3)