Event: One East

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Opponent	Rating	Result
John M Emms	2500	0 - 1
Geoff R Hermes	1848	½ - ½
Andrew D Craig	1773	½ - ½

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

1907 = (6121 + 400 * (0 - 1)) / 3)