Event: Div 1 - Davy Trophy

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Opponent Rating Result
David Ashcroft 1780 0 - 1
Tom Key 1563 ½ - ½
David Moore 1517 ½ - ½
Alan S McIntosh 1774 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1559 = (6634 + 400 * (0 - 1)) / 4)

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