Event: Croydon Shield

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Opponent Rating Result
Ian L Snape 2204 ½ - ½
Ian L Snape 2204 0 - 1
Jean-Baptiste Jugand 2074 1 - 0
Graham DJ Keane 2193 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2069 = (8675 + 400 * (1 - 2)) / 4)

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