Event: Div 1 - Davy Trophy

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Opponent Rating Result
Chris N Ross 2220 ½ - ½
Peter M Gayson 2126 ½ - ½
James RG Marley 2014 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2253 = (6360 + 400 * (1 - 0)) / 3)

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