Event: Division 1

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Opponent	Rating	Result
Michael Harris	2349	½ - ½
Philip S Fallon	2010	0 - 1
Oliver J Lenton	1960	½ - ½

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

1973 = (6319 + 400 * (0 - 1)) / 3)