Event: Doncaster League

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Opponent Rating Result
Phillip J Battye 1629 0 - 1
Konstantin Rybalcenko 1541 0 - 1
T Ed Sowerby 1584 0 - 1
Mick Henshaw 1490 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1161 = (6244 + 400 * (0 - 4)) / 4)

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