Event: Division One

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Opponent	Rating	Result
Paul Solomons	159	½ - ½
John K Holliday	141	0 - 1
Keith Marshall	143	½ - ½
David Shapland	176	½ - ½
Clive W Davies	155	½ - ½
Sam Scurfield	132	0 - 1
Dave Young	79	1 - 0

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

84 = (985 + 400 * (1 - 2)) / 7)