Event: Sheffield-Deaf-Internal

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Opponent	Rating	Result
Michael W Simmons	1207	1 - 0
Stephen Gibson	1538	0 - 1
Darci Cooper	1353	1 - 0

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

1499 = (4098 + 400 * (2 - 1)) / 3)