Event: C Division

Opponent Rating Result
Toefl Lankapura 1520 1 - 0
Stephen Rodgers 1645 1 - 0
Graham W Matthews 1648 ½ - ½
Joseph Thomas Machin 1490 1 - 0
Mark Turner 1497 1 - 0
Nick Tadd 1150 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1825 = (8950 + 400 * (5 - 0)) / 6)

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