Event: Div 2 - Weston Trophy

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Opponent Rating Result
John R Mercy 1766 1 - 0
Edouardos Ter Gevorkian 1940 0 - 1
Alan S McIntosh 1840 ½ - ½
Abdul Qahar Abdul Quadri 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1387 = (5546 + 400 * (1 - 1)) / 4)

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