Event: Division 1

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Opponent Rating Result
Nigel Redmond 1621 0 - 1
Mark D Crowther 2136 0 - 1
Vivien Webster 137 1 - 0
David Barlow 2079 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1393 = (5973 + 400 * (1 - 2)) / 4)

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