Event: One West

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Opponent Rating Result
Colin Mackenzie 2013 0 - 1
Omar Selim 1315 ½ - ½
David Hamilton 1608 0 - 1
John Abbot 1500 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1309 = (6436 + 400 * (0 - 3)) / 4)

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