Event: OTB "Friendly" Matches

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Opponent Rating Result
Paul R Barclay 1809 ½ - ½
Vittorio Nigrelli 1745 ½ - ½
Peter A Nickals 1771 1 - 0
Pete Meadows 1751 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1769 = (7076 + 400 * (1 - 1)) / 4)

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