Event: BCL Division 2

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Opponent	Rating	Result
George Griffiths	1455	0 - 1
Steven Wayne	1272	1 - 0
Sumit Bhalla	1422	0 - 1

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

1250 = (4149 + 400 * (1 - 2)) / 3)