Event: 4-Board Division 1

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Opponent Rating Result
Derek A Sheppard 1694 0 - 1
Keith Thompson 1792 ½ - ½
Andrew Donegan 1420 1 - 0
Mark Robinson 1426 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1583 = (6332 + 400 * (1 - 1)) / 4)

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