Event: Doncaster League

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Opponent Rating Result
Phillip J Battye 132 0 - 1
Anthony G Steele 112 1 - 0
Alan J Smith 111 1 - 0
Adam Bosak 155 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

128 = (510 + 400 * (2 - 2)) / 4)

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