Event: Richard Furness League

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Opponent Rating Result
Daniel Robinson 1495 ½ - ½
Mark Jones 1368 ½ - ½
Richard Hughes 1411 ½ - ½
Frank Skidmore 1398 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1518 = (5672 + 400 * (1 - 0)) / 4)

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