Event: Division 5

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Opponent Rating Result
Kevin Argyle 1458 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1458 = (1458 + 400 * (0 - 0)) / 1)

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Opponent Rating Result
Duncan White 1000 ½ - ½
Ray M Sayer 1468 1 - 0
Alan Johnson 892 1 - 0
Alan Shaw 1200 1 - 0
Kenneth B Heath 1169 1 - 0
Michael James 954 1 - 0
Amarishika Anbalagan 1172 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1351 = (7855 + 400 * (5 - 1)) / 7)