Event: Division 4

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Opponent Rating Result
John E Fryer 1489 1 - 0
Brian Homewood 1611 0 - 1
David J Barker 1507 1 - 0
Rhys Morgan 1328 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1484 = (5935 + 400 * (2 - 2)) / 4)

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