Event: 53rd Cotswold Open

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Opponent	Rating	Result
Joshua Pink	2088	½ - ½
Sam Jukes	1989	½ - ½
Jim Burnett	2111	0 - 1
John Jenkins	1980	0 - 1
David Lacey	1717	1 - 0

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

1897 = (9885 + 400 * (1 - 2)) / 5)