Event: Division 4B

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Opponent Rating Result
Ed Swann 1346 0 - 1
Walter Rogers 1482 1 - 0
Joseph T Fearnhead 1370 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1266 = (4198 + 400 * (1 - 2)) / 3)

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