Event: Div 1 - Davy Trophy

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Opponent	Rating	Result
Daniel JS Sullivan	2040	½ - ½
Daniel JS Sullivan	2040	0 - 1
John T Fletcher	2028	½ - ½
Ewan Cormack	2033	1 - 0
Peter M Gayson	2126	1 - 0

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

2133 = (10267 + 400 * (2 - 1)) / 5)