Event: Open

Opponent Rating Result
Shabir Okhai 2289 0 - 1
Graham J Sharpe 2006 ½ - ½
Martin P Burrows 2154 0 - 1
David J Farrall 1861 1 - 0
Rob Mitchell 1883 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2039 = (10193 + 400 * (2 - 2)) / 5)

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