Event: A Division

Opponent Rating Result
Nick Tadd 74 1 - 0
Royce Parker 136 ½ - ½
David Lowcock 101 1 - 0
Suresh Keswani 133 0 - 1
Brian Ellis 155 ½ - ½
David Smith 88 1 - 0
Peter R Archer 107 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

285 = (794 + 400 * (4 - 1)) / 7)

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