Event: Div 1 - Davy Trophy

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Opponent Rating Result
Jonathan Ferguson 1626 ½ - ½
Alan S McIntosh 1810 0 - 1
John Trafford 1877 0 - 1
John A Clark 1830 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1586 = (7143 + 400 * (0 - 2)) / 4)

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