Event: Division 1

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Opponent	Rating	Result
Andrew I Wilson	1978	0 - 1
Mike J Surtees	2107	0 - 1
Marek Mazek	2031	1 - 0

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

1905 = (6116 + 400 * (1 - 2)) / 3)