Event: Division 4

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Opponent Rating Result
Alfred D Din 1541 0 - 1
Hugh Conboy 0 0 - 1
Joshua Towers 0 0 - 1
Leon Campbell 1151 1 - 0
Michael James 922 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

643 = (3614 + 400 * (2 - 3)) / 5)

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