Event: South Cheshire Shield

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Opponent	Rating	Result
Isaac Stanley	1441	0 - 1
Douglas J Barnett	1467	0 - 1
Nick Deakin	1275	1 - 0

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

1261 = (4183 + 400 * (1 - 2)) / 3)