Event: Larry Guard League

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Opponent	Rating	Result
Benjamin Raspison	61	0 - 1
Graham A Mill-Wilson	108	0 - 1
Benjamin Raspison	61	1 - 0
Robin M Perry	71	0 - 1
Ivan Singleton	75	1 - 0
Geoffrey Wilson	92	½ - ½
Robin M Perry	71	1 - 0

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

77 = (539 + 400 * (3 - 3)) / 7)