Event: Division 1

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Opponent	Rating	Result
Paul N Fearnhead	1665	0 - 1
Liam Bromley	1503	½ - ½
Torrin Anderson	0	0 - 1

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

789 = (3168 + 400 * (0 - 2)) / 3)