Event: 54th Cotswold Open

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Opponent	Rating	Result
Michael H Stinton-Brownbridge	1849	1 - 0
Graham Bolt	2037	½ - ½
Bruce L Baer	2068	0 - 1
Zack Norris	1961	0 - 1

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

1879 = (7915 + 400 * (1 - 2)) / 4)