Event: Division 2

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Opponent	Rating	Result
Thomas Rudkins	1200	1 - 0
Darrell Lindsay	1395	0 - 1
Stephen Deakin	1492	0 - 1

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

1229 = (4087 + 400 * (1 - 2)) / 3)