Event: Div4

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Opponent Rating Result
Roy K Smith 77 1 - 0
Barry Hanford 45 1 - 0
Barry W Lings 99 0 - 1
Mohinderpal Samra 81 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

276 = (302 + 400 * (3 - 1)) / 4)

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Opponent Rating Result
Edward Brown 113 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-287 = (113 + 400 * (0 - 1)) / 1)