Event: Open

Opponent Rating Result
Henrik Stepanyan 2357 0 - 1
Neil Clarke 1938 1 - 0
Christopher J Evans 1698 1 - 0
Henrik Stepanyan 2357 0 - 1
Neil Clarke 1938 ½ - ½
Christopher J Evans 1698 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1998 = (11986 + 400 * (2 - 2)) / 6)

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