Event: Division 4

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Opponent Rating Result
John E Fryer 1488 0 - 1
Peter Turner 1358 0 - 1
Mark Szakacs 1458 0 - 1
Tony Brothwood 1629 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1183 = (5933 + 400 * (0 - 3)) / 4)

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