Event: Division C

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Opponent Rating Result
David McCormick 100 1 - 0
Marvin Carbin 100 0 - 1
Dave C Hartley 98 ½ - ½
Marvin Carbin 100 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

200 = (398 + 400 * (2 - 1)) / 4)

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