Event: South Cheshire Shield

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Opponent	Rating	Result
David J Barker	1487	0 - 1
Ethan Cole	700	0 - 1
Raymond F Rhodes	1227	½ - ½

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

871 = (3414 + 400 * (0 - 2)) / 3)