Event: Division C

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Opponent Rating Result
Colin Wilks 113 0 - 1
T Ben O'Rourke 120 ½ - ½
John Cox 82 1 - 0
Patrick N Coleman 104 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

105 = (419 + 400 * (1 - 1)) / 4)

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