Event: Division Four

Opponent Rating Result
Chris Moore 1483 0 - 1
George Mitchell 1496 0 - 1
Richard Wilkinson 1625 1 - 0
Kim T Gilbert 1571 0 - 1
Waleed Tahir 1526 0 - 1
Richard F Collett 1401 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1384 = (9102 + 400 * (2 - 4)) / 6)

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