Event: Open County Championship

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Opponent Rating Result
Ken B McEwan 2125 0 - 1
Graham E Borrowdale 2011 1 - 0
Charles Pickard 2180 ½ - ½
Gerald Moore 2150 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2117 = (8466 + 400 * (1 - 1)) / 4)

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