Event: Durham League Division A

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Opponent	Rating	Result
Paul R Bielby	1926	0 - 1
Mike Ayton	1815	½ - ½
Theo Jenkins	1781	½ - ½
Charlie Hazlerigg	1667	0 - 1
Theo Jenkins	1781	0 - 1
Christopher Sayers	1605	½ - ½
Joseph Barr	0	0 - 1
Oliver Montague	1626	½ - ½

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

1325 = (12201 + 400 * (0 - 4)) / 8)