Event: Division 2

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Opponent	Rating	Result
Simon Wilks	1925	½ - ½
Andrew J Donnelly	1834	1 - 0
James Irwin	1788	0 - 1

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

1849 = (5547 + 400 * (1 - 1)) / 3)