Event: Autumn League

Opponent Rating Result
Jeffrey Blumsom 1591 0 - 1
Glenn S Bourne 1435 1 - 0
Richard J West 1713 0 - 1
David Horton 1188 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1482 = (5927 + 400 * (2 - 2)) / 4)

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