Event: Bolton League Cup Div 2

Opponent Rating Result
Andrew Beavan 1452 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1052 = (1452 + 400 * (0 - 1)) / 1)

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Opponent Rating Result
Edward Chu 1490 1 - 0
Tim Clays 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1145 = (1490 + 400 * (2 - 0)) / 2)