Event: IM Brown

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Opponent Rating Result
Vivien Webster 1706 0 - 1
Zak Lipman 1410 1 - 0
Andrew Nettleship 1519 0 - 1
Simon Bartle 1201 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1359 = (5836 + 400 * (1 - 2)) / 4)

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