Event: IM Brown Shield

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Opponent Rating Result
Tom Key 1598 ½ - ½
David W Adam 1775 ½ - ½
James P Collier 1854 0 - 1
Andy Ross 1695 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1731 = (6922 + 400 * (1 - 1)) / 4)

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