Event: BCL Division 2

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Opponent Rating Result
Mark Osborn 1354 1 - 0
Dixon H Jones 1666 0 - 1
Mark Osborn 1354 0 - 1
Mark Osborn 1354 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1232 = (5728 + 400 * (1 - 3)) / 4)

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