Event: Roger Goldsmith Div 2

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Opponent Rating Result
Benjamin Varea 1454 ½ - ½
George Robinson 1386 1 - 0
Vikram K Banerjee 1493 0 - 1
Danny Harrison 1500 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1358 = (5833 + 400 * (1 - 2)) / 4)

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