Event: St Andrews Summer Tournament

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Opponent Rating Result
Dan Malbon 1281 ½ - ½
Darren Tomlinson 1076 0 - 1
Henrik Salbol 1324
Jacob Jackson 1455 0 - 1
Ronald Botham 1112 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1131 = (4924 + 400 * (1 - 2)) / 4)

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