Event: Minor Counties

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Opponent Rating Result
Daniel M Lambourne 2038 1 - 0
Jonathan WR Underwood 2100 0 - 1
Ken B McEwan 2172 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1970 = (6310 + 400 * (1 - 2)) / 3)

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