Event: Bolton League Cup

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Opponent Rating Result
Graham Peters 1238 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1238 = (1238 + 400 * (0 - 0)) / 1)

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

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