Event: Cotswold Open

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Opponent	Rating	Result
Bruce L Baer	2093	0 - 1
John Jenkins	2028	0 - 1
Bob R Gore	1779	1 - 0
Toby Carter	1988	0 - 1
Kandara Acharya	1751	½ - ½

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

1768 = (9639 + 400 * (1 - 3)) / 5)