Event: Open-Rapid-play

Opponent Rating Result
Tony Preece 1841 ½ - ½
David Thomson 1914 1 - 0
Doruk Unver 1696 0 - 1
Tony Preece 1841 ½ - ½
David Thomson 1914 0 - 1
Doruk Unver 1696 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1750 = (10902 + 400 * (1 - 2)) / 6)

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