Event: A Division

Opponent Rating Result
Giuseppe Magazzu 1982 0 - 1
Jake Pearson 1784 1 - 0
Stephen Cole 1849 0 - 1
Chris Swales 1736 0 - 1
Graham W Matthews 1626 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1555 = (8977 + 400 * (1 - 4)) / 5)

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