Event: C Division

Opponent Rating Result
Michael Houlston 1420 0 - 1
Jay Unadkat 1450 0 - 1
Ian Mitchell 1633 0 - 1
Dan Burgess 1461 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1291 = (5964 + 400 * (1 - 3)) / 4)

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