Event: Division 4

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Opponent Rating Result
James Marshall 101 ½ - ½
Andrew T Leadbetter 111 ½ - ½
Lukasz Michalek 90 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-33 = (302 + 400 * (0 - 1)) / 3)

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