Event: Croydon Shield

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Opponent Rating Result
James Fox 1825 1 - 0
Freddy Jiang 1923 ½ - ½
Orla Dorman 1726 1 - 0
John H Lewin 1855 ½ - ½
Martin G Smith 1960 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2018 = (9289 + 400 * (2 - 0)) / 5)

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