Event: Friendly Development League

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Opponent Rating Result
Brian Davies 1243 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1643 = (1243 + 400 * (1 - 0)) / 1)

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Opponent Rating Result
Paul Whitwell 1190 1 - 0
William T Jones 852 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1421 = (2042 + 400 * (2 - 0)) / 2)