Event: Open

Opponent Rating Result
Shabir Okhai 2252 0 - 1
Iulian Vaduva 1766 ½ - ½
Dave M Davies 1848 0 - 1
Shabir Okhai 2252 0 - 1
Iulian Vaduva 1766 1 - 0
Dave M Davies 1848 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1889 = (11732 + 400 * (2 - 3)) / 6)

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