Event: Division 1 - Davy Trophy

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Opponent Rating Result
James RG Marley 170 0 - 1
Andrew J Mort 158 ½ - ½
Robert Black 126 1 - 0
Robert Black 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

214 = (454 + 400 * (2 - 1)) / 4)

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