Event: Division 3

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Opponent Rating Result
Josh Bewsey-Holden 1500 0 - 1
Bernard Ross 1401 0 - 1
Mark Nowers 1200 1 - 0
John Harvey 1317 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1155 = (5418 + 400 * (1 - 3)) / 4)

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