Event: Division 1 - Davy Trophy

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Opponent Rating Result
James RG Marley 170 0 - 1
Peter Hulse 0 ½ - ½
Nicholas Mahoney 143 ½ - ½
Andrew J Mort 158 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

18 = (471 + 400 * (0 - 1)) / 4)

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