Event: Division 5

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Opponent Rating Result
R (Bob) Abrahart 1609 0 - 1
Nigel Bowler 1674 1 - 0
Ray M Sayer 1468 ½ - ½
Simon Parham 1238 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1597 = (5989 + 400 * (2 - 1)) / 4)

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