Event: Division 4

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Opponent Rating Result
Daniel McWilliams 114 0 - 1
Graham J Gibson 111 0 - 1
Jonah Tomsett 74 1 - 0
Michael James 33 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

83 = (332 + 400 * (2 - 2)) / 4)

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