Event: Mini League

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Opponent Rating Result
Peter Galloway 1459 ½ - ½
S Neil Bolton 1357 1 - 0
Luis Virgos Matilla 1470 0 - 1
Chris Tatham 1588 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1369 = (5874 + 400 * (1 - 2)) / 4)

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