Event: Division 2

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Opponent Rating Result
Joe Barraclough 1696 0 - 1
Les Johnson 1606 0 - 1
Vivien Webster 137 0 - 1
Nigel Redmond 1672 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

878 = (5111 + 400 * (0 - 4)) / 4)

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