Event: Cotswold Major

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Opponent Rating Result
Laurence JM Tarbuck 1744 ½ - ½
Carl Gartside 1819 1 - 0
Richard H Edney 1844 ½ - ½
Trevor J Holt 1749 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1789 = (7156 + 400 * (1 - 1)) / 4)

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