Event: League Division Two

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Opponent Rating Result
David Copson 1517 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1517 = (1517 + 400 * (0 - 0)) / 1)

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Opponent Rating Result
David Copson 1517 1 - 0
Roy Rice Guisado 1776 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2047 = (3293 + 400 * (2 - 0)) / 2)