Event: OTB HBZGP 8v8

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Opponent Rating Result
Ashley Freeman 1866 0 - 1
Mark RA Murrell 1755 ½ - ½
Terry D Whitton 1780 1 - 0
Istvan Karacsony 1960 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1740 = (7361 + 400 * (1 - 2)) / 4)

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