Event: Division Four

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Opponent Rating Result
Derek Green 118 0 - 1
Stuart Andrews 81 ½ - ½
Paul Silverman 102 0 - 1
John Burke 99 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-100 = (400 + 400 * (0 - 2)) / 4)

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