Event: Division 2

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Opponent	Rating	Result
Dougie Buchanan	1770	0 - 1
Richard Collis	1521	1 - 0
Grant Daly	1541	1 - 0

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

1744 = (4832 + 400 * (2 - 1)) / 3)