Event: Lewisham Club Championship

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Opponent	Rating	Result
Rod Wigbout	1935	0 - 1
Gabriel Jones	1559	0 - 1
Norman Cho	1250	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1448 = (4744 + 400 * (1 - 2)) / 3)