Event: Doncaster League

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Opponent Rating Result
John Smart 1683 0 - 1
Paul Shaw 0 ½ - ½
Richard E Desmedt 1782 1 - 0
Paul Shaw 0 0 - 1
Konstantin Rybalcenko 1541 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1001 = (5006 + 400 * (2 - 2)) / 5)

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