Event: South Cheshire Shield

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Opponent	Rating	Result
Jay Swann	1400	1 - 0
Ebube Christian	1538	½ - ½
Roger Coleman	1207	1 - 0

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

1648 = (4145 + 400 * (2 - 0)) / 3)