Event: Div 2 - Weston Trophy

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

1690 = (3780 + 400 * (0 - 1)) / 2)

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