Event: Division 2 East

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Opponent Rating Result
Paul Humphreys 135 ½ - ½
Paul Humphreys 135 1 - 0
Ilya Kamotskiy 139 ½ - ½
Christian K Brown 147 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

139 = (556 + 400 * (1 - 1)) / 4)

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