Event: 6-Board Division 2

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Opponent Rating Result
Steve J Thrower 1457 0 - 1
Ronald Botham 1112 1 - 0
Andy Booth 1000 1 - 0
Edward Staples 1300 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1217 = (4869 + 400 * (2 - 2)) / 4)

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